Which body structure is NOT composed of
epithelial tissue?
a. skin
b. nails
c. lining of the stomach
d. cartilage
e. all of these are composed of epithelial
tissue
D
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Which of the following is not one of the principles of linkage that Morgan obtained from his experiments?
A. Genes that are on the same chromosome may be inherited together. B. Crossing over exchanges pieces of chromosomes and creates new allele combinations. C. The likelihood of crossing over occurring between two genes is dependent on the distance of the genes from one another. D. Genes that are on the same chromosome are always transmitted together as a unit.
If you exposed a C4 plant to 14CO2 in the light, which would be the first organic molecule labeled with 14C?
A. phosphoenolpyruvate (PEP) B. malate C. pyruvate D. oxaloacetate
Disulfide bonds within or between proteins form easily in which of the following?
a. Both cytosol and ER b. Neither cytosol nor ER c. Cytosol but not ER d. ER but not cytosol
Which of the following statements is most true regarding X-inactivation?
A) When a cell divides, the inactive X-chromosome remains inactive in the newly formed cell. B) X-chromosomes that remain active are called Barr bodies. C) X-inactivation is more common in males than females. D) X-inactivation results in repressing the expression of approximately 75% of the genes on the X-chromosome. E) X-inactivation is caused primarily by the expression of several small noncoding RNAs (sncRNA).