List of top Biochemistry Questions

In light chain Immunoglobulin, the Carboxy terminus half of Molecule i.e. Constant (C) region consist of two basic amino acid Sequences named as:
The conversion of acyclovir to its active nucleotide form by viral thymidine kinase involves which type of reaction
Lycopene, an antioxidant, is classified as:
A 10-year-old patient has high total cholesterol, tendon xanthomas, and a family history of similar findings. Triglyceride levels are normal. What type of familial dyslipidemia is most likely?
A patient with orange-colored tonsils has a triglyceride level of 140 mg/dL and very low HDL cholesterol, 5 mg/dL. What is the most probable diagnosis?
A patient develops skin cancer and worsening hyperpigmentation following sun exposure. Which DNA repair pathway is most likely impaired?
A frameshift mutation from nucleotide insertion at position 4 of a 900-base mRNA is observed. What is the likely outcome?
A patient on long-term hydrochlorothiazide develops neuropathy, heart failure, and symmetrical paresthesia. Which nutrient deficiency is most likely responsible?
A patient with vitamin B12 deficiency presents with anemia, positive Romberg sign, and elevated homocysteine. Which amino acid is most likely deficient?
A patient has high phenylalanine levels despite normal phenylalanine hydroxylase. Which cofactor deficiency is most likely responsible?
A man survives 5 days without food. What is the brain's primary energy source during this prolonged fasting period?
A child presents with gum bleeding, perifollicular hemorrhages, petechiae, and recurrent fractures. Which enzyme deficiency is most likely?
In Hurler syndrome, which glycosaminoglycans accumulate and cause organ enlargement?
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
In kidneys the glomerular filtration rate (GFR) depends upon:
(A) The difference in hydrostatic and oncotic pressures between the glomerular capillaries and the lumen of the nephron.
(B) The nature of glomerular basement membrane.
(C) Total available filtration area.
(D) Relative concentration of ions.
Choose the correct answer from the options given below:
Which is the active form of Ganciclovir?
Which is the active form of Ganciclovir?
Calculate the \( \lambda_{\text{max}} \) of the following molecule:
Calculate the λmax of the following molecule:
Calculate the λmax of the following molecule