Select all events that occur during the follicular phase (first half) of the ovarian cycle.
Answer:
-ovarian follicles develop
-GnRH from the hypoalamus increased
-Blood estrogen increase
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Refer to the figure above. What is the function of the ACC sequence at the end?
A) It attaches to an amino acid. B) It base pairs with the codon of mRNA. C) It stabilizes the tRNA-amino acid complex. D) It is the active site of this ribozyme.
This molecule catalyzes covalent bond formation between fragments of DNA.
A. helicase B. ligase C. polymerase D. primase E. nuclease
Simple epithelial cells of the renal tubule have abundant __________ to increase the surface area for
reabsorption and numerous __________ to provide energy for actively transporting materials. a. microvilli; mitochondria b. cilia; mitochondria c. microvilli; Golgi complexes d. cilia; Golgi complexes e. cilia; capillaries
What do carbohydrates, lipids, and proteins have in common?
A) All are important enzymes that function within the cell. B) All are inorganic molecules. C) Covalent bonding holds these molecules together. D) Polymers of these organic molecules form monomers via dehydration synthesis reactions.