A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.For each of the following multiple choice questions, choose the most appropriate answer :
1. Which of the following is the storage form of proteins in human body?
A. Collagen
B. Titin
C. Both
D. None
2. What is the nature of bond between ubiquitin and the amino acid of the target protein?
A. Glycosidic bond
B. Hydrogen bond
C. Isopeptide bond
D. Hydrophobic interaction
3. Which of the following organelles is directly connected to the outer membrane of the nucleus in a eukaryotic cell?
A. Mitochondrion
B. Lysosome
C. Golgi apparatus
D. Endoplasmic reticulum
4. Tryptophan loading test is done to detect the deficiency of
A. Folate
B. PLP
C. TPP
D. Biotin
5. In FT-NMR, how are nuclei excited?
A. By radio-frequency radiation whose frequency is swept across a predetermined range
B. By an intense pulse of radiation which contains a wide range of frequencies
C. By an intense pressure
D. None of the above
6. Carbon skeleton of which of the following amino acids cannot produce intermediates of TCA cycle?
A. Histidine
B. Threonine
C. Proline
D. Leucine
7. Enzymes of irreversible steps in the glycolysis?
A. Hexokinase, Pyruvate kinase, Phosphofructokinase
B. A
C.
D. Hexokinase, Pyruvate kinase, 1,6 biphospho-fructokinase
8. Taurine is produced from
A. Arginine
B. Valine
C. Leucine
D. Cysteine
9. Coupling causes the peaks in 1H NMR spectra to be split into
A. two peaks
B. multiple peaks equal to the number of hydrogens on surrounding atoms
C. multiple peaks equal to the number of surrounding carbon atoms
D. multiple peaks equal to the number of hydrogen on surrounding atoms, plus one
10. Which of the following group of amino acids are absorbed in the enterocytes through Meister cycle?
A. Basic amino acids
B. Dibasic amino acids
C. Dicarboxylic amino acids
D. Neutral amino acids
11. The type II restriction endonucleases, bind to DNA sites
A. using H-bonds for specificity
B. that are usually palindromic
C. using non-sequence-dependent backbone interactions
D. all of the above
12. Which of the following statements about enzymes or their function is true?
A. Enzymes do not alter the overall change in free energy for a reaction
B. Enzymes are proteins whose three-dimensional form is key to their function
C. Enzymes speed up reactions by lowering activation energy
D. All of the above
13. The products of urea cycle are
A. 1 molecule of urea, 1 molecule of ammonia, 1 molecule of ATP and 1 molecule of fumaric acid
B. 1 molecule of fumaric acid, 1 molecule of urea, 1 molecule of AMP, 2 molecules of ADP
C. 1 molecule of aspartic acid, 1 molecule of ammonia, 1 molecule of fumaric acid, 1 molecule of ATP
D. None of the above
14. Which one of the following is a product of both cyclic and noncyclic photophosphorylation?
A. NADPH
B. O2
C. ATP
D. Carbohydrate
15. Eukaryotic mRNA binding to the ribosomes is facilitated by __________ .
A. the Shine Dalgarno sequence
B. the 7-methyl guanosine cap
C. tRNA
D. poly A tail
16. Mousy odor of urine in phenylketonuria is due to
A. Phenyl alanine
B. Phenyl pyruvate
C. Phenyl acetate
D. Phenyl lactate
17. The complex of RNA polymerase, DNA template and new RNA transcript is called
A. transcription bubble
B. replication bubble
C. a translation bubble
D. none of these
18. Which of the following mineral deficiency may result into impaired growth and development, skin lesions and loss of appetite?
A. Zinc
B. Cobalt
C. Iron
D. Magnesium
19. Bacteriorhodopsin
A. absorbs light and pumps protons
B. is an integral membrane protein
C. contains primarily alpha-helical residues
D. all of the above
20. Promoters for tRNAs are located
A. upstream from the start codon
B. downstream from the start codon
C. both (a) and (b)
D. none of these
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