Biomolecules Test 11

Result

Biomolecules Test 11

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Read the following passage to answer the following questions:
Proteins are polypeptide chains made up of amino acids. There are 20 types of amino acids joined together by peptide bond between amino and carboxylic group. There are two kinds of amino acids, Essential amino acids and Non-essential amino acids. The Primary structure of protein is the linear sequence of amino acids in a polypeptide chain. The first amino acid of sequence is called N-terminal amino acids and last amino acid of peptide chain is called C-terminal amino acids. The secondary structure proteins forms helix. There are three types of secondary structure: a helix, P pleated and collagen helix. In tertiary structure long protein chain is folded upon itself like a hollow woollen ball to give three-dimensional view of protein. In quaternary structure, each polypeptide develops its own tertiary structure and function as subunit of protein.
Q. Glycine and Alanine are different with respect to one substituent on the α-carbon. What are the other common substituent groups?

A
A. NH₂, COOH and H

B
B. NH₂ and H

C
C. COOH and NH₂

D
D. COOH and H

Solution

In both glycine and alanine, the common substituent groups are; a carboxyl group (COOH), an amine group (NH₂)and a side chain of a single hydrogen atom (-H).
Question 2
1 / -0

Read the following passage to answer the following questions:
Proteins are polypeptide chains made up of amino acids. There are 20 types of amino acids joined together by peptide bond between amino and carboxylic group. There are two kinds of amino acids, Essential amino acids and Non-essential amino acids. The Primary structure of protein is the linear sequence of amino acids in a polypeptide chain. The first amino acid of sequence is called N-terminal amino acids and last amino acid of peptide chain is called C-terminal amino acids. The secondary structure proteins forms helix. There are three types of secondary structure: a helix, P pleated and collagen helix. In tertiary structure long protein chain is folded upon itself like a hollow woollen ball to give three-dimensional view of protein. In quaternary structure, each polypeptide develops its own tertiary structure and function as subunit of protein.
Q. The tertiary structure of a protein contains

A
A. Hydrogen bonds

B
B. Peptide bonds

C
C. Ionic bonds and S-linkage

D
D. All of the above

Solution

Tertiary structure of protein is maintained by several types of bonds such as hydrogen bonds, ionic bonds, sulphide bonds and hydrophilic and hydrophobic bonds formed between are part of polypeptide and another.
Question 3
1 / -0

Read the following passage to answer the following questions:
Proteins are polypeptide chains made up of amino acids. There are 20 types of amino acids joined together by peptide bond between amino and carboxylic group. There are two kinds of amino acids, Essential amino acids and Non-essential amino acids. The Primary structure of protein is the linear sequence of amino acids in a polypeptide chain. The first amino acid of sequence is called N-terminal amino acids and last amino acid of peptide chain is called C-terminal amino acids. The secondary structure proteins forms helix. There are three types of secondary structure: a helix, P pleated and collagen helix. In tertiary structure long protein chain is folded upon itself like a hollow woollen ball to give three-dimensional view of protein. In quaternary structure, each polypeptide develops its own tertiary structure and function as subunit of protein.
Q. The smallest amino acid is

A
A. Phenol

B
B. Formic acid

C
C. Glycine

D
D. Methane

Solution

The simplest, and smallest, amino acid is glycine for which the R-group is a hydrogen (H).
Question 4
1 / -0

Read the following passage to answer the following questions:
Proteins are polypeptide chains made up of amino acids. There are 20 types of amino acids joined together by peptide bond between amino and carboxylic group. There are two kinds of amino acids, Essential amino acids and Non-essential amino acids. The Primary structure of protein is the linear sequence of amino acids in a polypeptide chain. The first amino acid of sequence is called N-terminal amino acids and last amino acid of peptide chain is called C-terminal amino acids. The secondary structure proteins forms helix. There are three types of secondary structure: a helix, P pleated and collagen helix. In tertiary structure long protein chain is folded upon itself like a hollow woollen ball to give three-dimensional view of protein. In quaternary structure, each polypeptide develops its own tertiary structure and function as subunit of protein.
Q. There is extensive diversity of protein molecules is due to

A
A. NH₂ - group of amino acid

B
B. R - group of amino acid

C
C. COOH- group of amino acid

D
D. Sequence of amino acids

Solution

Protein is a polypeptide chain made up of amino acids. The amino acids consist of amine group (NH₂-) and the carboxyl group(COOH-) at the end and a side chain of R- group which is specific to a particular amino acid. This specific group brings a variability to the proteins e.g, if R group is H it is glycine while if it is CH, It is alanine. The sequence of amino acids determines the protein. Therefore, diversity of protein molecules is due to the different sequence of amino acids linked with the protein molecules.
Question 5
1 / -0

Read the following passage to answer the following questions:
Proteins are polypeptide chains made up of amino acids. There are 20 types of amino acids joined together by peptide bond between amino and carboxylic group. There are two kinds of amino acids, Essential amino acids and Non-essential amino acids. The Primary structure of protein is the linear sequence of amino acids in a polypeptide chain. The first amino acid of sequence is called N-terminal amino acids and last amino acid of peptide chain is called C-terminal amino acids. The secondary structure proteins forms helix. There are three types of secondary structure: a helix, P pleated and collagen helix. In tertiary structure long protein chain is folded upon itself like a hollow woollen ball to give three-dimensional view of protein. In quaternary structure, each polypeptide develops its own tertiary structure and function as subunit of protein.
Direction: In the following questions the Assertions (A) and Reasons (R) have been put forward. Read both the statements and choose the correct option from the following:
Assertion : Amino acids are monomers of nucleic acid.
Reason : Protein amino acids have an unlimited variety.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Amino acids are monomers of protein and are not of nucleic acid. Proteins are built from a set of only 20 amino acid.
Question 6
1 / -0

Read the following passage to answer the following questions:
The enzyme molecule operates by chemically binding with the substrate molecule, to form an enzyme-substrate complex. The enzyme's tertiary structure consists of a unique pocket or site on which the substrate molecules can become attached and interact subsequently. This brings about an interaction between the specific active sites in the enzyme molecule and the reactive sites in the substrate molecule. The enzyme now breaks down the substrate into- products. The products initially remain attached to the enzyme for a short while forming an enzyme product complex. The products get released from the enzyme molecule subsequently. The enzyme is now ready to receive another substrate molecule again. Thus, the same enzyme can be used again and again.
Q. Which of the following is the best evidence for the lock and key theory of enzyme reaction:

A
A. All enzymes are proteins.

B
B. Compounds similar in structure to substrate inhibit the reaction.

C
C. Certain enzymes speed up certain reactions.

D
D. Direction of reaction is determine by enzyme.

Solution

The compound similar in structure to substrate block the active site of the enzyme. Therefore, the substrate fail to unite with the enzyme and thus the reaction is inhibited.
Question 7
1 / -0

Read the following passage to answer the following questions:
The enzyme molecule operates by chemically binding with the substrate molecule, to form an enzyme-substrate complex. The enzyme's tertiary structure consists of a unique pocket or site on which the substrate molecules can become attached and interact subsequently. This brings about an interaction between the specific active sites in the enzyme molecule and the reactive sites in the substrate molecule. The enzyme now breaks down the substrate into- products. The products initially remain attached to the enzyme for a short while forming an enzyme product complex. The products get released from the enzyme molecule subsequently. The enzyme is now ready to receive another substrate molecule again. Thus, the same enzyme can be used again and again.
Q. Khosland's model of enzyme action implies that:

A
A. Enzyme and substrate unit at the active site like lock and key fits a lock.

B
B. Inducible change is brought about at the active site of enzyme by substrate.

C
C. Active site of enzyme brings about the conformational change in the substrate.

D
D. None of the above

Solution

The substrate brings about the conformational change in the active site of enzyme thus forming suitable ES complex This is in accordance with the Khosland's induced fit model of enzyme action.
Question 8
1 / -0

Read the following passage to answer the following questions:
The enzyme molecule operates by chemically binding with the substrate molecule, to form an enzyme-substrate complex. The enzyme's tertiary structure consists of a unique pocket or site on which the substrate molecules can become attached and interact subsequently. This brings about an interaction between the specific active sites in the enzyme molecule and the reactive sites in the substrate molecule. The enzyme now breaks down the substrate into- products. The products initially remain attached to the enzyme for a short while forming an enzyme product complex. The products get released from the enzyme molecule subsequently. The enzyme is now ready to receive another substrate molecule again. Thus, the same enzyme can be used again and again.
Q. The complete conjugate enzyme, consisting of an apoenzyme and a cofactor, is called

A
A. Isoenzyme

B
B. Holoenzyme

C
C. Riboenzyme

D
D. Zymogen

Solution

The complete conjugate enzyme, consisting of an apoenzyme (the protein portions of enzyme) and a cofactor (the nonprotein constituent of an enzyme), is called holoenzyme.
The multiple molecular forms of an enzyme occurring in the same organism and having a similar substrate activity are called isozymes. The nucleic acids that behave like enzymes are called ribozymes. The inactive state of enzyme is called zymogen.
Question 9
1 / -0

Read the following passage to answer the following questions:
The enzyme molecule operates by chemically binding with the substrate molecule, to form an enzyme-substrate complex. The enzyme's tertiary structure consists of a unique pocket or site on which the substrate molecules can become attached and interact subsequently. This brings about an interaction between the specific active sites in the enzyme molecule and the reactive sites in the substrate molecule. The enzyme now breaks down the substrate into- products. The products initially remain attached to the enzyme for a short while forming an enzyme product complex. The products get released from the enzyme molecule subsequently. The enzyme is now ready to receive another substrate molecule again. Thus, the same enzyme can be used again and again.
Q. Model of Emil Fisher implies that:

A
A. Active site of enzyme is flexible and adjust to the substrate.

B
B. An enzyme and a substrate unit at the active site thus forming the enzyme substrate complex.

C
C. The active site requires removal of PO4 group.

D
D. Active site is complementary to that of substrate.

Solution

Active site is complementary to that of substrate. The enzyme molecule interacts with only a specific type of substrate which unite with and fits in the enzyme like a key in the lock.
Question 10
1 / -0

Read the following passage to answer the following questions:
The enzyme molecule operates by chemically binding with the substrate molecule, to form an enzyme-substrate complex. The enzyme's tertiary structure consists of a unique pocket or site on which the substrate molecules can become attached and interact subsequently. This brings about an interaction between the specific active sites in the enzyme molecule and the reactive sites in the substrate molecule. The enzyme now breaks down the substrate into- products. The products initially remain attached to the enzyme for a short while forming an enzyme product complex. The products get released from the enzyme molecule subsequently. The enzyme is now ready to receive another substrate molecule again. Thus, the same enzyme can be used again and again.
Direction : In the following questions the Assertions (A) and Reasons (R) have been put forward. Read both the statements and choose the correct option from the following:
Assertion : Enzyme and substrate respectively have active and reactive sites on their surface.
Reason : Active and reactive sites push the enzyme and substrate molecules away from each other.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Active and reactive sites of enzyme and substrate do not push away each either but make them to unite to form the ES complex.
Question 11
1 / -0

Read the following passage to answer the following questions:
Neutral or true fats are esters of fatty acid with glycerol. They are also called glycerol. A fat molecule consists of one molecule of glycerol and one to three molecules of the same or different long-chain fatty acids. Glycerol has 3 carbons each bearing a hydroxyl (OH) group. Whereas fatty acid molecule is an unbranched chain of carbon atoms having a carboxylic group attached to an R group. The R group could be a methyl (-CH₃) or ethyl (-C₂H₅) or higher number of -CH₂ groups (C1 to 19-C). eg. Palmitic acid has 16-C. Saturated fatty acid are without double bonds whereas unsaturated fatty acid are with one or more double bonds. Neutral fats may be monoglycerides if there is only one molecule of fatty acid attached to a glycerol molecule. If the number of fatty acids attached is two then it is a diglyceride or triglyceride if it is three. Esters of fatty acid with high molecular weight alcohol are called waxes. Compound lipids are also esters but contain some other substances also. Steroids and prostaglandins are derived lipids.
Q. How many molecules of fatty acids may occur in a lipid molecule?

A
A. One

B
B. Two

C
C. Three

D
D. One to three

Solution

A fatty acid molecule may contain 1-3 fatty acid, They are called mono glycerides diglycerides and triglycerides are respectively, one, two, three fatty acids are attached to a glycerol molecules.
Question 12
1 / -0

Read the following passage to answer the following questions:
Neutral or true fats are esters of fatty acid with glycerol. They are also called glycerol. A fat molecule consists of one molecule of glycerol and one to three molecules of the same or different long-chain fatty acids. Glycerol has 3 carbons each bearing a hydroxyl (OH) group. Whereas fatty acid molecule is an unbranched chain of carbon atoms having a carboxylic group attached to an R group. The R group could be a methyl (-CH₃) or ethyl (-C₂H₅) or higher number of -CH₂ groups (C1 to 19-C). eg. Palmitic acid has 16-C. Saturated fatty acid are without double bonds whereas unsaturated fatty acid are with one or more double bonds. Neutral fats may be monoglycerides if there is only one molecule of fatty acid attached to a glycerol molecule. If the number of fatty acids attached is two then it is a diglyceride or triglyceride if it is three. Esters of fatty acid with high molecular weight alcohol are called waxes. Compound lipids are also esters but contain some other substances also. Steroids and prostaglandins are derived lipids.
Q. Polyunsaturated fatty acid contain

A
A. Few double bounds

B
B. Single double bond

C
C. No double bond

D
D. Alternate double bond

Solution

They are fatty acids (PUFA) that I contain more than one double bonds
Question 13
1 / -0

Read the following passage to answer the following questions:
Neutral or true fats are esters of fatty acid with glycerol. They are also called glycerol. A fat molecule consists of one molecule of glycerol and one to three molecules of the same or different long-chain fatty acids. Glycerol has 3 carbons each bearing a hydroxyl (OH) group. Whereas fatty acid molecule is an unbranched chain of carbon atoms having a carboxylic group attached to an R group. The R group could be a methyl (-CH₃) or ethyl (-C₂H₅) or higher number of -CH₂ groups (C1 to 19-C). eg. Palmitic acid has 16-C. Saturated fatty acid are without double bonds whereas unsaturated fatty acid are with one or more double bonds. Neutral fats may be monoglycerides if there is only one molecule of fatty acid attached to a glycerol molecule. If the number of fatty acids attached is two then it is a diglyceride or triglyceride if it is three. Esters of fatty acid with high molecular weight alcohol are called waxes. Compound lipids are also esters but contain some other substances also. Steroids and prostaglandins are derived lipids.
Q. Paraffin wax is

A
A. Ester

B
B. Acid

C
C. Monohydric alcohol

D
D. Cholesterol

Solution

Paraffin wax is the ester of fatty acid with long chain high molecular weight alcohol.
Question 14
1 / -0

Read the following passage to answer the following questions:
Neutral or true fats are esters of fatty acid with glycerol. They are also called glycerol. A fat molecule consists of one molecule of glycerol and one to three molecules of the same or different long-chain fatty acids. Glycerol has 3 carbons each bearing a hydroxyl (OH) group. Whereas fatty acid molecule is an unbranched chain of carbon atoms having a carboxylic group attached to an R group. The R group could be a methyl (-CH₃) or ethyl (-C₂H₅) or higher number of -CH₂ groups (C1 to 19-C). eg. Palmitic acid has 16-C. Saturated fatty acid are without double bonds whereas unsaturated fatty acid are with one or more double bonds. Neutral fats may be monoglycerides if there is only one molecule of fatty acid attached to a glycerol molecule. If the number of fatty acids attached is two then it is a diglyceride or triglyceride if it is three. Esters of fatty acid with high molecular weight alcohol are called waxes. Compound lipids are also esters but contain some other substances also. Steroids and prostaglandins are derived lipids.
Q. Lecithin is a

A
A. Glycolipid

B
B. Steroid

C
C. Phospholipid

D
D. Carbohydrate

Solution

Lecithin is a compound liquid. It is also an ester of fatty acid with alcohol but also contain other substances. Lecithin consists of glycerol, two fatty acids, a phosphate group and choline.
Question 15
1 / -0

Read the following passage to answer the following questions:
Neutral or true fats are esters of fatty acid with glycerol. They are also called glycerol. A fat molecule consists of one molecule of glycerol and one to three molecules of the same or different long-chain fatty acids. Glycerol has 3 carbons each bearing a hydroxyl (OH) group. Whereas fatty acid molecule is an unbranched chain of carbon atoms having a carboxylic group attached to an R group. The R group could be a methyl (-CH₃) or ethyl (-C₂H₅) or higher number of -CH₂ groups (C1 to 19-C). eg. Palmitic acid has 16-C. Saturated fatty acid are without double bonds whereas unsaturated fatty acid are with one or more double bonds. Neutral fats may be monoglycerides if there is only one molecule of fatty acid attached to a glycerol molecule. If the number of fatty acids attached is two then it is a diglyceride or triglyceride if it is three. Esters of fatty acid with high molecular weight alcohol are called waxes. Compound lipids are also esters but contain some other substances also. Steroids and prostaglandins are derived lipids.
Direction : In the following questions the Assertions (A) and Reasons (R) have been put forward. Read both the statements and choose the correct option from the following:
Assertion : Polyunsaturates are considered good for health.
Reason : They help in reducing blood cholesterol level.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Polyunsaturates are the oils containing polyunsaturated fatty acids. They help in reducing the risk of heart disease by lowering cholesterol levels in blood.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Biomolecules Test 11

Result

Biomolecules Test 11

Score

-

Rank

-

SHARING IS CARING

Question 1

A. NH2, COOH and H

B. NH2 and H

C. COOH and NH2

D. COOH and H

Solution

Question 2

A. Hydrogen bonds

B. Peptide bonds

C. Ionic bonds and S-linkage

D. All of the above

Solution

Question 3

A. Phenol

B. Formic acid

C. Glycine

D. Methane

Solution

Question 4

A. NH2 - group of amino acid

B. R - group of amino acid

C. COOH- group of amino acid

D. Sequence of amino acids

Solution

Question 5

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution

Question 6

A. All enzymes are proteins.

B. Compounds similar in structure to substrate inhibit the reaction.

C. Certain enzymes speed up certain reactions.

D. Direction of reaction is determine by enzyme.

Solution

Question 7

A. Enzyme and substrate unit at the active site like lock and key fits a lock.

B. Inducible change is brought about at the active site of enzyme by substrate.

C. Active site of enzyme brings about the conformational change in the substrate.

D. None of the above

Solution

Question 8

A. Isoenzyme

B. Holoenzyme

C. Riboenzyme

D. Zymogen

Solution

Question 9

A. Active site of enzyme is flexible and adjust to the substrate.

B. An enzyme and a substrate unit at the active site thus forming the enzyme substrate complex.

C. The active site requires removal of PO4 group.

D. Active site is complementary to that of substrate.

Solution

Question 10

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution

Question 11

A. One

B. Two

C. Three

D. One to three

Solution

Question 12

A. Few double bounds

B. Single double bond

C. No double bond

D. Alternate double bond

Solution

A. NH₂, COOH and H

B. NH₂ and H

C. COOH and NH₂

A. NH₂ - group of amino acid