Biomolecules Test

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Biomolecules Test - 26

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Weekly Quiz Competition

Question 1
1 / -0

What is a coenzyme?

A
Always protein

B
Often metal

C
Always inorganic compound

D
Often a vitamin

Solution

Enzymes are simple if they are made up of only proteins, e.g., pepsin, amylase etc., while conjugate enzymes have an additional non-protein organic coenzyme or inorganic cofactor. Loosely attached organic cofactors are called as coenzymes, e.g., NAD, FAD TPP etc. Coenzymes are generally derived from vitamins like thiamine (TPP), riboflavin (FMN, FAD), niacin (NAD), pantothenate (CoA).
Question 2
1 / -0

The complex formed by a pair of synapsed homologous chromosomes is called :Homologous chromosome are paired and synapsed during zygotene stage of meiosis-I and known as bivalent

A
NADH

B
ATP

C
$$H_2$$O

D
$$FAD^+$$ or $$FADH_2$$

Solution

Pathway-A is glycolysis
Pathway-B is Krebs cycle
Pathway-C is Electron transport system
1, 5 are respiratory substrates like protein and fats 6,7,3,9,10 are $$NADH_2$$, $$FADH_2$$
* 4, 8, 12 are ATP produced
Question 3
1 / -0

Which of the following is a source of instant energy?

A
Salt

B
Glucose

C
Water

D
Starch

Solution

Glucose is a source of instant energy because it is quick to act to create energy along with oxygen so our body does not need to convert the glucose to anything else. It also can be absorbed through the lining of the stomach.
Question 4
1 / -0

Enzymes are found in all living cell. Their main functions is

A
To help in the digestion of food

B
To allow chemical to food reaction

C
To speed up the break down of substance

D
To accelerate the rate of chemical reactions

Solution

Enzymes are biocatalysts that causes a change in the rate of a chemical reaction i.e they may enhance (accelerate) or reduce the rate of a chemical reaction. So, the correct answer is ' To accelerate the rate of chemical reactions'.
Question 5
1 / -0

During a biochemical reaction, an enzyme

A
Becomes part of the product

B
Remains unchanged

C
Broken down into amino acids

D
Reacts with fatty acids

E
Becomes a polypeptide

Solution

Any chemical reaction includes the formation of transition state between reactant and product. The energy required for formation of the transition state is termed as activation energy. Enzymes enhance the rate of reaction by lowering down the activation energy of transition state but themselves remain unchanged. Thus, the correct answer is B.
Question 6
1 / -0

The chemical nature of enzymes is

A
Protein

B
Nucleic acid

C
Carbohydrate

D
Lipid

E
Steroid

Solution

Chemically, enzymes are the polymer of amino acids i.e. they are proteins. Nucleic acid serves as heredity material while carbohydrates have the strctural role. Lipids serve as a structural component as well as storage of energy. Steroids are structural lipids. Thus, the correct answer is A.
Question 7
1 / -0

What is the chemical nature of enzyme?

A
Protein

B
Nucleic acid

C
Carbohydrate

D
Lipid

E
Steroid

Solution

Enzymes are proteinaceous in nature. They are the polymeric chain of amino acid linked together by peptide bonds. Nucleic acids are polymer of nucleotides while carbohydrates are compounds with C, H and O. Lipids are mostly hydrophobic compounds of diverse nature and include phospholipids and steroids.
So, the correct answer is option A.
Question 8
1 / -0

The empirical formula for glucose is:

A
$$C_2H_4O_2$$

B
$$CH_2O$$

C
$$CHO$$

D
$$C_2HO_2$$

Solution

Hint: $$Glucose$$ is a monosaccharide containing $$six$$ $$Carbon$$ atom and an $$aldehyde$$ group.

Correct Option: $$B$$

Explanation:
• The empirical formula of glucose would be the simplest whole-number ratio of all the atoms in the compound.
• As the chemical formula of $$Glucose$$ is $$C_6H_{12}O_6$$ and rations of atoms in glucose is $$CH_2O$$.

• if we multiply the $$CH_2O$$ with $$6$$ then we get the molecular formula of glucose $$(6×$$ $$CH_2O)$$ $$=C_6H_{12}O_6$$
• where $$6$$ is the simplest whole number.
• The molecular weight of the $$glucose$$ is $$180$$ $$\dfrac{g}{mol}$$and empirical formula weight is $$30 \dfrac {g}{mol}$$

Hence, the correct answer is $$CH_2O$$
Question 9
1 / -0

Agarose is a polymer of:

A
glucose

B
agarobiose

C
polyacrylamide

D
bisacrylamide

Solution

Agarose is a polymer of agarobiose.
Agarose:-Agarose is a polysaccharide, generally extracted from certain red seaweed. It is a linear polymer made up of the repeating unit of agarobiose, which is a disaccharide made up of D-galactose and $$3,6$$-anhydro-L-galactopyranose.
Question 10
1 / -0

Enzymes are an example of which biological molecule?

A
Carbohydrates

B
Proteins

C
Lipids

D
Nucleic acids

E
Steroids

Solution

Enzymes are water soluble colloidal macromolecules which are wholly or partially proteinaceous in nature. The protein part of enzyme is called apoenzyme while the non protein part is called prosthetic group which may be coenzyme or cofactor.
Hence, enzymes are basically proteins.
So, the correct answer is Proteins.

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Biomolecules Test - 26

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Biomolecules Test - 26

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SHARING IS CARING

Question 1

Always protein

Often metal

Always inorganic compound

Often a vitamin

Solution

Question 2

NADH

ATP

$$H_2$$O

$$FAD^+$$ or $$FADH_2$$

Solution

Question 3

Salt

Glucose

Water

Starch

Solution

Question 4

To help in the digestion of food

To allow chemical to food reaction

To speed up the break down of substance

To accelerate the rate of chemical reactions

Solution

Question 5

Becomes part of the product

Remains unchanged

Broken down into amino acids

Reacts with fatty acids

Becomes a polypeptide

Solution

Question 6

Protein

Nucleic acid

Carbohydrate

Lipid

Steroid

Solution

Question 7

Protein

Nucleic acid

Carbohydrate

Lipid

Steroid

Solution

Question 8

$$C_2H_4O_2$$

$$CH_2O$$

$$CHO$$

$$C_2HO_2$$

Solution

Question 9

glucose

agarobiose

polyacrylamide

bisacrylamide

Solution

Question 10

Carbohydrates

Proteins

Lipids

Nucleic acids

Steroids

Solution

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