5-Fluorounacil inhibits the formation of nucleotides containing the base a. aden

Question

5-Fluorounacil inhibits the formation of nucleotides containing the base a. adenine. b. cytosine c. guanine d. thymine 6-Mercoptopurine mimics the base adenine, forming a pseudonucleotide and thus slowing a. cell-mediated immune reactions b. DNA synthesis c. RNA transport d. viral replication Methotrexate is a folic acid that slows. a. cell division b. cell-mediated immune reactions. c. transport of nutrients to the cancer cell d. viral replication Cisplatin inhibits cell division by a. being incorporated in RNA b. binding to DNA and blocking its replication c. holing viral replication d. substituting for cytosine in a nucleotide Which of the following anticancer drugs was once used as a chemical warfare agent? a. cisplatin b. methotrexate c. nitrogen mustards d. vinblastine Cyclophosphamide acts by a. being incorporated in RNA b. cross-linking two DNA strands and blocking replication c. haling viral replication d. substituting for cytosine in a nucleotide Hormones are produced in the endocrine glands and act a. on the brain only b. on nearby cells only c. on sex oxygen only d. throughout the body Prostaglandins are synthesized in the body from a. acid b. ascorbic acid c. cholesterol d. progesterone Which of the following is not a steroid? The gonads are stimulated to produce sex hormones and eggs or sperm by a. ACTH and LH b. FSH and LH c. LH and CRF d. TRF and GH The hormone that maintains pregnancy is a. estradiol b. estrone c. progesterone d. prolactin The functional group that makes a birth control drug effective orally is a. CH_3CH_3- b. CH_2=CH- c. HC=C- d. CH_3CO- Which of the following is a treatment for hypertension (high blood pressure)? a. acetaminophen b. a diuretic c. nitroglycerin d. prednisone Drugs called beta blockers a. lessen blood flow to the kidneys b. lessen the damage due to beta particles c. prevent the hydrolysis of beta linkages d. slow the rate of the heartbeat Drugs such as amyl nitrate and nitroglycerin act by releasing a substance that relaxes the smooth muscles in blood vessels, That substance is

Explanation / Answer

D

1. D Thymine

2. B DNA synthesis

3. A Cell Division

4. B Binding to DNA and blocking its replication

5. C Nitrogen Mustard

6. B cross-linking two DNA strands and blocking replication

E

1. D throughout the body

2. A arachidonic acid

3. C prolactin

4. B FSH and LH

5. C progesterone

6. C

F

1. B Diuretic

2. D slow the rate of the heartbeat

3. C Nitric Oxide

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