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SAT Biology (Molecular) → SAT Biology (Molecular) practice test paper questions from 61 to 70
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61. Insulin is an important hormone that serves to decrease one’s blood sugar. Glucagon has the opposite effect through
(A) the conversion of glycogen to glucose
(B) the secretion of glucose by cells
(C) causing gluconeogenesis
(D) all of the above
(E) none of the above
62. In humans, the structure that receives blood from the lungs is the
(A) aorta
(B) pulmonary artery
(C) pulmonary vein
(D) renal vein
(E) femoral artery
63. Which of the following statements about antibodies is false?
(A )Antibodies are produced by different combinations of soluble proteins in the blood called complement
(B) When antibodies bind to a bacterial cell, it may keep that cell from adhering to host cells
(C) The specific receptors on T cells that would interact with a specific antigen are the same shape as antibodies that will interact with that antigen
(D) By binding to antigens, antibodies mark those antigens for destruction by macrophages
(E) By binding to an invader, antibodies attract proteins that lyse the target membrane
64. Which of the following statements about muscle contraction is (are) true?
(A) Calcium ions combine with troponin to cause a conformational change in tropomyosin
(B) Myosin and actin slide together because of the binding and contraction of actin filaments
(C) Tropomyosin wraps around myosin and blocks the binding sites between actin and myosin
(D) Both (A) and (B) are true
(E) Both (B) and (C) are true
65. Viruses are an exception to the cell theory because they
(A) normally reproduce by binary fission
(B) normally reproduce by forming spores
(C) lack either DNA or RNA
(D) have no cell organelles
(E) normally reproduce only in host cells
66. The hydrogen bonds in water are a result of
(A) the hydrogen of one molecule bonding to the hydrogen of another molecule
(B) the oxygen of one molecule bonding to one of the hydrogens of that molecule
(C) the hydrogen of a water molecule bonding to the nitrogen of another
(D) the hydrogen of one molecule bonding to the oxygen of another molecule
(E) none of the above
67. Which of the following DNA sequences would code for the polypeptide glutamine, lysine, histidine?
(A) CAG AAA CAU
(B) ACT CCC ACG
(C) GUC UUU GUA
(D) GTC TTT GTA
(E) none of the above
68. If a DNA strand contained the sequence ATG AGT CGT, what one base substitution could keep the translation from being completed?
(A) A to G
(B) T to A
(C) G to C
(D) C to G
(E) G to A
69. Which element acts as a hydrogen acceptor during aerobic respiration?
(A) carbon
(B) oxygen
(C) hydrogen
(D) nitrogen
(E) phosphorus
70. Which of the following statements about the menstrual cycle is false?
(A) Luteinizing hormone is produced by the pituitary in response to GNRH from the hypothalamus
(B) Luteinizing hormone acts on the follicle, causing ovulation
(C) Birth control pills that contain estrogen and progesterone would inhibit the secretion of FSH by the pituitary
(D) The endometrium builds up to its maximum thickness soon after the release of FSH
(E) Progesterone helps maintain the corpus luteum after ovulation
ANSWERS: SAT BIOLOGY PRACTICE TEST QUESTIONS
61. D
62. C
63. A
64. A
65. E
66. D
67. D
68. C
69. B
70. D