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- Question
The immunoglobulin fold is
Options- A. found only in IgG molecules
- B. a ?-barrel composed of a three- and a four-stranded antiparallel ?-sheet
- C. both (a) and (b)
- D. found six times in the IgG molecule
- Correct Answer
- a ?-barrel composed of a three- and a four-stranded antiparallel ?-sheet
- 1. In the initial step of photosynthesis, sunlight energizes the electron pair of
Options- A. adenosine triphosphate (ATP)
- B. chlorophyll pigments
- C. water
- D. carbon dioxide Discuss
- 2. Which enzyme catalyzes the elongation of DNA molecules?
Options- A. DNA polymerase
- B. Helicase
- C. DNA ligase
- D. Primase Discuss
- 3. The lac operon contains the z, y and a structural genes
Options- A. encoding p-galactosidase, galactose permeases and thio-galactosidase transacetylase respectively
- B. encoding p-galactosidase and galactose permeases
- C. encoding P-galactosidase only
- D. None of the above Discuss
- 4. Specific translocations are associated with
Options- A. colon cancer
- B. breast cancer
- C. pancreatic cancer
- D. some leukemias Discuss
- 5. The enzymes of the TCA cycle in a eukaryotic cell are located in the
Options- A. nucleus
- B. mitochondria
- C. plasma membrane
- D. lysosomal bodies Discuss
- 6. Lipoic acid is a co-factor of the
Options- A. pyruvic dehydrogenase
- B. ?-ketoglutaric dehydrogenase
- C. both (a) and (b)
- D. di-hydroorotate dehydrogenase Discuss
- 7. Cleavage of DNA by EcoRI endonuclease results in the formation of
Options- A. two 3'-OH ends and two 5'-phosphate ends
- B. one 3'-OH end and one 5'-phosphate end
- C. two 3'-phosphate ends and two 3'-OH ends
- D. one 3'-OH end and two 5'-phosphate end Discuss
- 8. Which of the following is correct in terms of determination of location of genetic traits?
Options- A. Known protein coding sequences are too far apart to allow linkage determination for most new genes
- B. Restriction sites allow DNAs to be digested
- C. Protein-coding genes are always associated with a restriction pattern
- D. None of the above Discuss
- 9. An oil drop with a polar coat is a metaphor referring to the three dimensional structure of
Options- A. fibrous proteins
- B. collagen
- C. globular proteins
- D. silk protein Discuss
- 10. Which of the following processes involve the combining of a message from one signaling molecule with that of another to either enhance or inhibit a cellular effect?
Options- A. Signal transduction
- B. Signal reception
- C. Signal integration
- D. Signal amplification Discuss
More questions
Correct Answer: chlorophyll pigments
Correct Answer: DNA polymerase
Correct Answer: encoding p-galactosidase, galactose permeases and thio-galactosidase transacetylase respectively
Correct Answer: some leukemias
Correct Answer: mitochondria
Correct Answer: both (a) and (b)
Correct Answer: two 3'-OH ends and two 5'-phosphate ends
Correct Answer: Known protein coding sequences are too far apart to allow linkage determination for most new genes
Correct Answer: globular proteins
Correct Answer: Signal integration
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