List of top Biochemistry Questions

The correct order of enzymes involved in the synthesis of pyrimidine nucleotide is: A. Aspartate transcarbamoylase B. Dihydroorotase C. Carbamoyl phosphate synthetase II D. OMP decarboxylase E. Dihydroorotate dehydrogenase Choose the correct answer from the options given below:

A person is eating polished rice throughout his life, deficiency of which vitamins he/she is likely to have?

Different forms of Vitamin A are: A. Retinal (Vitamin A aldehyde) B. Retinyl Palmitate (Vitamin A acid) C. Retinol (Vitamin A alcohol) D. Retinyl ester (Vitamin A ester) E. $\beta$-carotene (provitamin A) Choose the correct answer from the options given below:

Why the absorption of UV light by double stranded DNA increases (hyperchromic effect) when the DNA is denatured?

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Protein synthesis is a central function in cellular physiology and is the primary target of many naturally occurring antibiotics and toxins. Tetracyclines are a class of broad-spectrum antibiotics used in the management and treatment of infectious disease by inhibiting translational machinery in bacteria. Reason (R): Tetracyclines inhibit protein synthesis in bacteria by blocking the A site on the ribosome, preventing the binding of aminoacyl tRNA. In the light of the above statements, choose the most appropriate answer from the options given below:

What are the different forms of Alanine?

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): In a zinc finger about 30 amino acids form an elongated loop held together at the base by a single \(\text{Zn}^{2+}\) ion which is coordinated to form residues (with Cys and/or His).

Reason (R): The Zn does not itself interact with DNA, rather the coordination of Zn with amino acid residues stabilizes the small structural motif.

In the light of the above statements, choose the most appropriate answer from the options given below:

\(\text{NAD}^{+}\) dependent enzyme are/is:

A. Glyceraldehyde 3-phosphate dehydrogenase

B. Lactate dehydrogenase

C. Malic enzyme

D. HMG CoA reductase

Choose the correct answer from the options given below:

Outlines of cholesterol biosynthesis includes: A. 2 Acetyl CoA $\rightarrow$ Acetoacetyl CoA B. Mevalonate $\rightarrow$ HMG CoA C. Acetoacetyl CoA $\rightarrow$ HMG CoA D. Acetoacetyl CoA $\rightarrow$ 2 Acetyl CoA E. HMG CoA $\rightarrow$ Mevalonate Choose the correct answer from the options given below:

Which one of the following is not a test for sugar?

Conversion of L-Tyrosine to Epinephrine includes: A. L-Tyrosine $\rightarrow$ DOPA B. Norepinephrine $\rightarrow$ Dopamine C. DOPA $\rightarrow$ Dopamine D. Epinephrine $\rightarrow$ Norepinephrine Choose the correct answer from the options given below:

List the proteins detection techniques in increasing order of sensitivity: A. Bradford, B. Biuret, C. Lowry Choose the correct answer from the options given below:

Which one of the test, is not given by proteins?

How many cycles of $\beta$-oxidation are required for the complete oxidation of activated Oleic acid, 18 : 1 $(\Delta^{9})$?

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Neurons are the functional cells in brain. Glial cells are the supporting cells of the brain. Reason (R): Astroglia are star-shaped neuronal cells. In the light of the above statements, choose the most appropriate answer from the options given below:

Based on the position of Centromere Chromosome can be divided into 4 types: A. Metacentric: Centromere in the middle B. Submetacentric: Centromere at the end C. Telocentric: Terminal Centromere D. Acrocentric: Centromere is close to middle Choose the correct answer from the options given below:

Which of the following are the correct components of PCR reaction?

A. Taq Polymerase
B. Buffer (5X)
C. Primers (F and R)
D. NTPs
E. \(\text{H}_{2}\text{O}\)

Choose the correct answer from the options given below:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Covalent single bonds in biological molecules have energies similar to the energy of the C-C bond in ethane. Reason (R): It is because less electrons are shared between atoms in double bonds they require more energy to break than single bonds. In the light of the above statements, choose the most appropriate answer from the options given below:

A solution is called hypertonic when:

Primary changes in Acid Base disorders are: