Biomolecules Test

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Biomolecules Test - 92

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Weekly Quiz Competition

Question 1
1 / -0

A test tube contains 4000 substrate moles along with its corresponding enzyme whose TON is 20. After 10 minutes if 40% of the substrate is left in the test tube, then how many enzyme molecules are involved in the reaction?

A
$$\displaystyle 24$$

B
$$\displaystyle 12$$

C
$$\displaystyle 400$$

D
$$\displaystyle 72$$
Question 2
1 / -0

Which one of the following is an example of an enzyme group called transferase?

A
Acetyl Co-A synthetase

B
Alpha-amylase

C
Fructose biphosphate aldolase

D
3-Phosphoglycerate kinase
Question 3
1 / -0

The term feedback refers to the effect of

A
Substrate on the rate of enzymatic reaction

B
End product on the rate of enzymatic reaction

C
Enzyme concentration on its rate of reaction

D
An external compound on the rate of enzymatic reaction

Solution

Accumulation and formation of end products at the end of a reaction triggers feedback.
So, the correct option is 'End product on the rate of enzymatic reaction'.

Question 4

1 / -0

Match column I with column II and select the correct option from the given codes.

Sr.No	List I	Sr.No	List II
A.	GLUT-4	1.	Intercellular ground substance
B.	Antibody	2.	Enzyme
C.	Collagen	3.	Hormone
D.	Trypsin	4.	Flights infectious agents
E.	Insulin	5.	Enables glucose transport in cells

A-(i),B-(ii),C-(iii),D-(iv),E-(v)

A-(v),B-(iv),C-(i),D-(ii),E-(iii)

A-(v),B-(iv),C-(iii),D-(ii),E-(i)

A-(ii),B-(i),C-(iv),D-(v),E-(iii)

Solution

Antibodies are the structures that help in maintaining the immunity of the body towards the antigens that are infectious agent whether be it bacteria or viruses.

GLUT 4 is a component which helps and enables the glucose transport. Collagen is a type of secondary protein structure that is the component of the muscles and various tissue which has high tensile strength. Insulin is a hormone which is peptide in nature and the controls the sugar levels in the blood. Trypsin is an enzyme of digestive system secreted in the pancreatic juices.

So, the correct option is 'A-(v),B-(iv),C-(i),D-(ii),E-(iii)'

Question 5
1 / -0

Which of the following is not metabolised in human body and therefore, used in determining glomerular filtration rate?

A
Insulin

B
Inulin

C
Cellulose xanthate

D
Toxic ketones

Solution

Inulin is an indicator of GFR because, it is neither reabsorbed into the blood after filtration nor secreted through peritubular capillaries, amount of inulin cleared through the urine is indicative of the amount of plasma filtered by body's glomeruli.
So, the correct option is 'Inulin'.
Question 6
1 / -0

Enzymes generally have

A
Same pH and temperature optima

B
Same pH but different temperature optima

C
Different pH but same temperature optima

D
Different pH and different temperature optima

Solution

Enzymes are biocatalyst that affects the rate of biochemical reactions they generally have the same pH and temperature Optima at which they work efficiently.
So, the correct option is 'Same pH and temperature optima'.
Question 7
1 / -0

Which of the following graphs correctly indicates the reaction in the presence (indicated by $$+$$) and absence (indicated as $$-$$) of an enzyme?

A

B

C

D
Question 8
1 / -0

The enzyme which has EC number 4.2.1.7 is assigned to which of the following classes of enzyme?

A
Hydrolases

B
Lyases

C
Isomerases

D
Ligases

Solution

The EC number 4.2.1.7 is assigned to the enzyme named altronate dehydratase or D-altronate hydro-lyase. This enzyme catalyses the dehydration of D-altronate and results in the formation of 2-dehydroxy-3-deoxy-D-gluconate and water.
Thus, the answer is B, i.e., the enzyme which has EC number 4.2.1.7 is assigned to the class of Lyases.
Question 9
1 / -0

Which of the following pair of vitamin participates as co factors in the cellular oxidation reduction reaction?

A
Pyridoxine and folate

B
Riboflavin and Cobalamine

C
Ascorbate and nicotinamide

D
Thiamine and pantothenate

Solution

Coenzymes are a type of cofactor which are small organic molecules that bind tightly (prosthetic groups) or loosely (cosubstrates) to enzymes as they participate in catalysis. Vitamin which participates as co factors in the cellular oxidation reduction reaction are riboflavin and cobalamine.
So, the correct answer is 'Riboflavin and Cobalamine'.
Question 10
1 / -0

Which of the following statement is incorrect? Choose answer:

A
The acid insoluble fraction, has only four types of organic compounds, proteins, polysaccharides nucleic acids and lipids

B
Chemical compounds found in living organisms are of two types, acid soluble and acid insoluble

C
The compounds which are found in the acid insoluble fraction are called micromolecules

D
The acid soluble pool represents roughly the cytoplasmic composition

Solution

Biomolecules with molecular weights more than one thousand Dalton are called biomacromolecules. These are found in the acid-insoluble fraction. Lipids are not strictly macromolecules as their molecular weights do not exceed 800 Da but form a part of the acid insoluble pool. The molecules in the insoluble fraction with the exception of lipids are polymeric substances. Lipids are indeed small molecular weight compounds and are present not only as such but also arranged into structures like cell membrane and other membranes. So the acid insoluble fraction has only four types of organic compounds, proteins, polysaccharides nucleic acids and lipids but except for lipids none of them are micromolecules.

So the correct option is 'The compounds which are found in the acid insoluble fraction are called micromolecules'.