Put the following steps of DNA replication in chronological order
1. Single-stranded binding proteins attach to DNA strands.
2. Hydrogen bonds between base pairs of antiparallel strands are broken.
3. Primase binds to the site of origin.
4. DNA polymerase binds to the template strand.
5. An RNA primer is created.
A) 1, 2, 3, 4, 5
B) 2, 1, 3, 5, 4
C) 3, 2, 1, 5, 4
D) 3, 1, 2, 4, 5
Answer: B
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The process of diffusion requires:
A. a concentration gradient. B. ATP energy. C. the random movement of molecules. D. transport proteins.
Which of the following would NOT be an example of negative feedback control in homeostasis?
A. Blood volume and pressure drop due to minor bleeding. This decreased pressure causes the kidneys to increase water reabsorption to restore blood volume and pressure. B. Exposure to cold water causes body temperature to drop. Decreased stimulation of heat receptors causes constriction of blood vessels near the skin and better retention of heat. C. Glucose levels rise following consumption of a big dessert, triggering release of insulin which causes glucose levels to fall. D. During the birth process, stretch receptors in the uterus stimulate the release of oxytocin from the pituitary gland. This hormone stimulates uterine muscle contraction that increases stimulation of the stretch receptors. E. Blood levels of glucose fall during sustained exercise, causing the release of glucagon which stimulates the release of glucose into the blood.
Light enters the eye's interior through the __________, an adjustable opening in the center of the muscular, doughnutshaped
iris. Fill in the blank(s) with the appropriate word(s).
Which of the following nerves has activity during quiet inspiration?
A) phrenic nerve only B) internal intercostal nerve only C) external intercostal nerve only D) both the phrenic nerve and internal intercostal nerves E) both the phrenic nerve and external intercostal nerves