Biomolecules Test

Result

Biomolecules Test - 64

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

Rate of reaction depends upon_________?

A
Temperature

B
Catalyst

C
Concentration

D
All of these

Solution
Question 2
1 / -0

The segment of DNA which acts as the instrumental manual for the synthesis of the protein is:

A
ribose

B
gene

C
nucleoside

D
nucleotide

Solution

A gene is the molecular unit of heredity of a living organism. It is widely accepted by the scientific community as a name given to some stretches of deoxyribonucleic acids (DNA) and ribonucleic acids (RNA) that code for a polypeptide or for an RNA chain that has a function in the organism, though there still are controversies about what plays the role of the genetic material.
Question 3
1 / -0

Which of the following statements correctly completes the statement?
Except for glycine, which is achiral, all the amino acids present in proteins

A
are chiral but racemic

B
have the $$L$$ configuration at their $$\alpha $$ carbon

C
have the $$R$$ configuration at their $$\alpha $$ carbon

D
have the $$S$$ configuration at their $$\alpha $$ carbon

Solution

Glycerine is the only amino acid which is achiral because it has 2 Hydrogen atoms attached to the alpha carbon.
All the amino acids present in proteins have the L configuration at their $$\alpha$$ carbon.This is because D- Amino Acids are not naturally found in proteins.
So Option b is correct
Question 4
1 / -0

Optimum temperature and pH for enzyme.

A
$$20$$-$$25^o$$-C and $$7$$pH

B
$$20$$-$$35^o$$-C and $$6.5$$ pH

C
$$20$$-$$35^o$$-C and $$7.5$$pH

D
All correct

Solution

The optimum temp of enzymes is 20-35°C. They become inactivated at very low temperature and denatured (destroyed) at very high temp i.e. greater than 45°C. Low molecular weight enzymes are comparatively more heat stable. In archaebacterium Pyrococcus furiosus, the optimum temperature of hydrogenase is greater than 95°C. This heat-stable enzyme enables Pyrococcus to grow at 100°C. The optimum pH of most endoenzyme is pH 7.0 (neutral pH). However, digestive enzymes can function at different pH. For example, salivary amylase act best at pH 6.8, pepsin act best at pH2 etc. Any fluctuation in pH from the optimum causes ionization of R-groups of amino acids which decrease the enzyme activity. Sometimes a change in pH causes the reverse reaction, e.g. at pH 7.0 phosphorylase break down starch into glucose 1- phosphate while at pH5 the reverse reaction occurs.

So, the correct option is '20-25$$^o$$ C and 7.0 pH'
Question 5
1 / -0

The active site of an enzyme is formed by a few of the enzyme's

A
Carboxyl groups of the amino acids in $$ {1 }^{ 0 } $$ and $$ {2 }^{ 0 } $$ structure

B
Amino groups of the amino acids in $$ {1 }^{ 0 }$$ and $$ {2 }^{ 0 } $$ structure

C
R groups of the amino acids in $$ {3 }^{ 0 } $$ structure

D
Exposed sulphur bonds in $$ {1 }^{ 0 } $$ and $$ {3 }^{ 0 } $$ structure
Solution
- The active sites of the enzyme are formed by the amino acids which are present in the structure. These are special sites that catalyze reactions with the help of special arrangement of the R groups of amino acids in the tertiary structure.
- The interactions taking place between the side chains of amino acids give catalytic activity to the enzyme.
The carboxyl group and the amino group of the proteins help it in folding rather than much activity as an active site.
The primary and secondary structures of proteins usually do not have enzymatic activity and they need to fold in a special tertiary confirmation to become enzymatic.

So the correct answer is ' R groups of the amino acid in 3° structure'.
Question 6
1 / -0

Which one of the following reactions is incorrect?

A
$$Maltose + H_2O \overset{Maltase}{\rightarrow} Glucose+ Fructose$$

B
$$Sucrose + H_2O \overset{Invertase}{\rightarrow} Glucose+ Fructose$$

C
$$Glucose + H_2O \overset{Zymase}{\rightarrow} Ethyl \, alcohol+CO_2$$

D
$$Starch + H_2O \overset{Diastase}{\rightarrow} Glucose \,only$$

Solution

Maltose is made up of two glucose units.
$$Maltose+H_2O \overset{Maltase}{\rightarrow} Glucose+Glucose$$

Option A is correct.
Question 7
1 / -0

Starch is:

A
$$C_{12}H_{22}O_{11}$$

B
$$C_6H_{10}O_5$$

C
$$(C_6H_{10}O_5)_n$$

D
$$(C_6H_{12}O_6)_n$$

Solution

Starch is a polymeric carbohydrate consisting of large number of glucose units joined by glycosidic bonds.
Molecular formula of starch is $$\left( { C }_{ 6 }{ H }_{ 10 }{ O }_{ 5 } \right) n$$
Question 8
1 / -0

In a double stand DNA percentage of adenine (A) in bases is $$22\%$$ then $$\%$$ of guanine (G) is:

A
$$28\%$$

B
$$44\%$$

C
$$50\%$$

D
$$60\%$$

Solution
Question 9
1 / -0

Some proteoltic enzymes are-

A
Trypsin, Erepsin, pepsin

B
Amylase, lipase, zymase

C
Ampylopsin, stapsin, ptyalin

D
Urease, Dehydrogenase, Zymase

Solution

Proteolytic enzymes are those which help break down and digest proteins. They are essential for cell division, immune function, and protein recycling. Trypsin, Erepsin, and pepsin are the essential proteolytic enzymes. These enzymes help to break down protein in meat, eggs, and fish into simpler amino acids.
So, the correct answer is Trypsin, Erepsin, pepsin
Question 10
1 / -0

A compound with molecular mass 180 is acylated with $$CH_3COCl$$ to get a compound with molecular mass $$390$$. The number of amino groups present per molecule of former compound is:

A
$$6$$

B
$$2$$

C
$$5$$

D
$$4$$

Solution

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Biomolecules Test - 64

Result

Biomolecules Test - 64

Score

-

Rank

-

SHARING IS CARING

Question 1

Temperature

Catalyst

Concentration

All of these

Solution

Question 2

ribose

gene

nucleoside

nucleotide

Solution

Question 3

are chiral but racemic

have the $$L$$ configuration at their $$\alpha $$ carbon

have the $$R$$ configuration at their $$\alpha $$ carbon

have the $$S$$ configuration at their $$\alpha $$ carbon

Solution

Question 4

$$20$$-$$25^o$$-C and $$7$$pH

$$20$$-$$35^o$$-C and $$6.5$$ pH

$$20$$-$$35^o$$-C and $$7.5$$pH

All correct

Solution

Question 5

Carboxyl groups of the amino acids in $$ {1 }^{ 0 } $$ and $$ {2 }^{ 0 } $$ structure

Amino groups of the amino acids in $$ {1 }^{ 0 }$$ and $$ {2 }^{ 0 } $$ structure

R groups of the amino acids in $$ {3 }^{ 0 } $$ structure

Exposed sulphur bonds in $$ {1 }^{ 0 } $$ and $$ {3 }^{ 0 } $$ structure

Solution

Question 6

$$Maltose + H_2O \overset{Maltase}{\rightarrow} Glucose+ Fructose$$

$$Sucrose + H_2O \overset{Invertase}{\rightarrow} Glucose+ Fructose$$

$$Glucose + H_2O \overset{Zymase}{\rightarrow} Ethyl \, alcohol+CO_2$$

$$Starch + H_2O \overset{Diastase}{\rightarrow} Glucose \,only$$

Solution

Question 7

$$C_{12}H_{22}O_{11}$$

$$C_6H_{10}O_5$$

$$(C_6H_{10}O_5)_n$$

$$(C_6H_{12}O_6)_n$$

Solution

Question 8

$$28\%$$

$$44\%$$

$$50\%$$

$$60\%$$

Solution

Question 9

Trypsin, Erepsin, pepsin

Amylase, lipase, zymase

Ampylopsin, stapsin, ptyalin

Urease, Dehydrogenase, Zymase

Solution

Question 10

$$6$$

$$2$$

$$5$$

$$4$$

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.