List of top Biochemistry Questions

E. coli is grown exclusively in a medium containing \(^{15}NH_4Cl\) as the sole nitrogen source. Subsequently, the cells were shifted to a medium containing \(^{14}NH_4Cl\). The molar ratio of hybrid DNA (\(^{15}N-^{14}N\)) to light DNA (\(^{14}N-^{14}N\)) after four generations (rounded off to two decimal places) will be .......

The DNA double helix measures 0.34 nm/bp. The diameter of a nucleosome core particle is 11 nm. If the ratio of wrapped DNA length to nucleosome diameter is 4.51, the length of DNA around the nucleosome (to the nearest integer) is ...... bp.

The DNA double helix measures 0.34 nm/bp. The diameter of a nucleosome core particle is 11 nm. If the ratio of wrapped DNA length to nucleosome diameter is 4.51, the length of DNA around the nucleosome (to the nearest integer) is ...... bp.

E. coli is grown exclusively in a medium containing \(^{15}NH_4Cl\) as the sole nitrogen source. Subsequently, the cells were shifted to a medium containing \(^{14}NH_4Cl\). The molar ratio of hybrid DNA (\(^{15}N-^{14}N\)) to light DNA (\(^{14}N-^{14}N\)) after four generations (rounded off to two decimal places) will be .......

Which one of the following DNA repair systems requires DNA glycosylases?

For an enzyme that follows Michaelis-Menten kinetics, a competitive inhibitor

Zinc is essential for the function of

The substrate concentration at which an enzyme-catalyzed reaction proceeds at one-half of its velocity is called:

A substance that receives electrons in an oxidation-reduction reaction is called:

In 1953, Frederick Sanger determined the amino acid sequence of which protein?

One Angstrom (A°) is equal to:

Read the following statements carefully:
(A) Ultracentrifugation separates molecules based on their density
(B) Gel electrophoresis separates molecules based on their mobility in an electric field
(C) Gel filtration separates molecules based on their size
(D) NMR separates molecules based on their proton signal
Choose the correct answer from the options given below:

Human acute liver failure can be due to:

The causes of increased Gamma-glutamyl Transferase (GGT) in human serum can be due to:

Among the following Liver Function Tests, which one indicates hepatocellular damage?

Of the following pH values, which one is the lowest?

Albinism is a genetic disorder associated with:

Among the following enzymes, which one has the highest turnover number (kcat)?

Enzymes that are involved in the transfer of electrons (hydride ions or H atoms) are called:

Immune cells that ingest large particles and cells by phagocytosis are called:

A metabolic condition in which the capacity of the body to buffer OH⁻ is diminished, is called:

In a substrate-enzyme reaction, the term Kₐ denotes which one of the following?

Match List I with List II

List I	Ion Channel Defects	List II: Disease
A	Na⁺	(i) Polycystic kidney disease
B	Ca²⁺	(ii) Generalized epilepsy
C	K⁺	(iv) Dominant deafness
D	Cl^-	(iii) Cystic fibrosis

Choose the correct answer from the options given below:

Match List I with List II

List I	Animal Plasma Membrane	List II: Type of Sterol
A	Human myelin sheath	(iii) Cholesterol
B	Maize leaf	(iv) Stigmasterol
C	Yeast	(ii) Ergosterol
D	Paramecium	(i) Sitosterol

Choose the correct answer from the options given below:

Match List I with List II

List I	Category	List II: Examples
A	Fatty acids	(iv) Oleate
B	Prenol lipids	(ii) Farnesol
C	Saccharolipids	(iii) Lipopolysaccharide
D	Polyketides	(i) Tetracycline

Choose the correct answer from the options given below:

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