Test Your Knowledge - Free MCQ PRACTICE
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DRIVINGTEST
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. Enzyme-driven metabolic pathways can be made more efficient by
A. concentrating enzymes within specific cellular compartments
B. grouping enzymes into free-floating, multienzyme complexes
C. fixing enzymes into membranes so that they are adjacent to each other
D. All of the above

2. A nicked RNA molecule can be ligated by
A. T4 RNA ligase
B. DNA polymerase
C. T4 DNA ligase
D. all of these

3. Beta pleated sheets are examples of protein's
A. primary structure
B. secondary structure
C. tertiary structure
D. quaternary structure

4. Reactions that have positive standard free energy changes (?Go> 0) can be made to occur in cells by
A. coupling them with exergonic reactions via a common intermediate
B. manipulating the concentrations of products and reactants such that G/<0
C. coupling them to the hydrolysis of ATP
D. all of the above

5. The peptide, Val-Lys-Glu-Met-Ser-Trp-Arg-Ala, was digested with cyanogen bromide (CNBr) to produce:
A. Val-Lys + Glu-Met-Ser + Trp-Arg-Ala
B. Val-Lys-Glu-Met-Ser-Trp + Arg-Ala
C. Val-Lys-Glu-Met + Ser-Trp-Arg-Ala
D. Val-Lys-Glu + Met-Ser-Trp-Arg-Ala

6. Small charged molecules, often biogenic amines function as
A. hormones
B. neurotransmitters
C. both (a) and (b)
D. none of these

7. Gluconeogenesis in Fasting state is indicated by
A. Citrate activation by acetyl co-a carboxylase
B. Pyruvate Carboxylase activation by Acetyl CoA
C. Fructose 1,6 bisphosphate activation by Pyruvate Kinase
D. Fructose 2,6 bisphosphate activation by PFK-1

8. Which of the following techniques is used for detection of variation in DNA sequence and Gene expression?
A. Northern Blot
B. Southern Blot
C. Western Blot
D. Microarray

9. Prenatal Diagnosis of hemophilia is best done by:
A. PCR
B. Linkage analysis
C. Cytometry
D. Microarray

10. A mutation in the tip binding site of the repressor would result in
A. constitutive trp operon expression
B. inducible trp operon expression
C. no operon expression
D. none of the above

11. A polysome could be best described as
A. an active site of DNA synthesis.
B. an active site of protein synthesis.
C. an active site of lipid synthesis.
D. all of the above.

12. If more than one codon codes for same amino acid, this phenomenon is known as
A. Degeneracy
B. Frame-Shift Mutation
C. Transcription
D. Mutation

13. Which of the following may be added to stabilize the protein after yeast cells disruption?
A. NaCl
B. Protease inhibitor
C. AMP
D. All of these

14. An allosteric activator
A. increases the binding affinity
B. decreases the binding affinity
C. stabilizes the R state of the protein
D. both (a) and (c)

15. Ketone Bodies are not utilized by
A. Brain
B. RBC
C. Renal cortex -
D. Skeltal muscle

16. Attractive Vander Waals forces occur between
A. apolar molecules in the liquid state
B. any pair of nearby atoms
C. polar molecules in the solid state
D. only if other forces are less favorable

17. Sphingomyelinase deficiency is seen in:
A. Niemann - pick disease
B. Farber's disease
C. Tay Sach's disease
D. Krabbe's disease

18. RNA polymerase in prokaryotes has a removable
A. alpha subunit
B. beta subunit
C. both (a) and (b)
D. sigma subunit

19. A cell which defends against body cells in which viruses are reproducing is
A. Exotoxin
B. Cytotoxic T cell
C. Endotoxin
D. Suppressor T cell

20. In reverse phase chromatography, the stationary phase is made
A. non-polar
B. polar
C. either non-polar or polar
D. none of these

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