Page 1 of 1: MCQ "4"

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Question 20. The factors that decrease the affinity of hemoglobin for oxygen are:

(a) Carbon dioxide.
True False

(b) An increase in pH.
True False

(c) A decreased number of erythrocytes in the blood.
True False

(d) An increase in 2,3-diphosphoglycerate.
True False

Question 21. With which of the following is hypocalcemia associated?

(a) Muscle twitching and cramp.
True False

(b) Vitamin D deficiency.
True False

(c) Hypomagnesemia.
True False

(d) Decreased osteoid formation.
True False

Question 21. With which of the following is hypocalcemia associated?

(a) Muscle twitching and cramp.
True False

(b) Vitamin D deficiency.
True False

(c) Hypomagnesemia.
True False

(d) Decreased osteoid formation.
True False

Question 21. With which of the following is hypocalcemia associated?

(a) Muscle twitching and cramp.
True False

(b) Vitamin D deficiency.
True False

(c) Hypomagnesemia.
True False

(d) Decreased osteoid formation.
True False

Question 22. Synthesis and maturation of mRNA in eukaryotic cells can involve:

(a) Post-transcriptional addition of polyA to the 3' termini of RNA molecules.
True False

(b) Nucleic acid sequences that are separated from one another in DNA and next to one another in mRNA.
True False

(c) Giant precursor molecules that are largely destroyed.
True False

(d) Addition of the cap structure to the 5' termini of mRNA.
True False

Question 23. Translation requires:

(a) A methionyl initiator tRNA molecule.
True False

(b) Elongation factors for translocation of ribosomes along the mRNA.
True False

(c) GTP for energy.
True False

(d) Initiation factors for bringing mRNA, ribosomes, and tRNA together.
True False

Question 24. Which of the following is/are true of gene expression?

(a) Only involves transcription-related proces-ses.
True False

(b) May be influenced by the sex of the individual.
True False

(c) Is always regulated by glucocorticoids.
True False

(d) Regulation of the expression of a single gene may involve two different processes.
True False

(e) Is never influenced by age.
True False

Question 25. Which of the following methods of regulating gene expression is/are common?

(a) Use of alternative promoters.
True False

(b) Post-translational cleavage.
True False

(c) RNA editing.
True False

(d) Alternative splicing of DNA.
True False

(e) Multigenic transcription units.
True False

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