The human genome comprises:
a. an X and a Y chromosome.
b. a homologous pair of chromosomes.
c. 46 chromosomes.
d. 46 pairs of chromosomes.
e. 23 chromosomes.
Ans: c. 46 chromosomes.
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The human urinary system consists of all of the
following structures EXCEPT
a. urinary bladder. b. urethra. c. two adrenal glands. d. two ureters. e. two kidneys.
Gram-positive bacteria would stain ____ in a gram stain because of a thick layer of ____ in their cell walls
a. green; cellulose b. red; polysaccharides c. green; peptidoglycan d. purple; peptidoglycan e. purple; polysaccharides
Epinephrine blocks the contraction of muscles in the airways. Which of the other activities of epinephrine is most likely to be regulated by the same type of pathway?
A. promotes the breakdown of glycogen in skeletal muscle cells B. stimulation of heart muscle cell contraction C. increased sweating D. inhibition of saliva production in salivary glands E. contraction of smooth muscle cells in blood vessels
Bacterial protein synthesis can begin before the reading of the gene is complete.
Answer the following statement true (T) or false (F)