Megaspores
a. are haploid.
b. produce the embryo sac.
c. produce gametophytes.
d. are female.
e. fit all of these descriptions.
Answer: e
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This is a nucleotide containing molecule that is commonly used to carry electrons in the cell.
A. ADP B. ATP C. NAD+ D. pyruvic acid
Analysis of the primary transcript for an insulin receptor protein reveals that exon 11 has been removed from the mRNA in skeletal muscle, but not in liver. How does this affect the proteins synthesized in these two types of cells?
A. Translation of the insulin receptor mRNA is inhibited in skeletal muscle. B. Translation of the insulin receptor mRNA is inhibited in the liver. C. The mRNA transcript for the insulin receptor protein will be identical in both the liver and skeletal muscle and so translation occurs in both cell types. D. The insulin receptor in skeletal muscle has a higher affinity for insulin than the receptor in the liver. E. The insulin receptor in the liver has a higher affinity for insulin than the receptor in skeletal muscle.
Parathyroid hormone's main function is to
A. increase glucose mobilization during stress or fasting. B. increase calcium by mobilizing the ion from bone. C. increase sodium through reabsorption from kidney. D. increase insulin-like growth factor I and linear body growth. E. synergize with thyroid hormone in various functions.
Which of the following fishes has a jaw,
scales, and a cartilaginous skeleton?
a. lampreys b. goldfish c. coelacanths d. sharks e. more than one of these