The ________ secretes digestive enzymes and bicarbonate solution into the small intestine to aid digestion.
A. gallbladder
B. pancreas
C. spleen
D. liver
Answer: B
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The primary structure in a protein
A. refers to the helical folding of a protein. B. refers to two or more polypeptides linked to one another. C. refers to the sequence of amino acids. D. refers to the initial folding of a protein.
If one strand of DNA has the nitrogenous base sequence ATTCGACGCTA, then the complementary strand has the nitrogenous base sequence
a. TAAGCTGCGAT. b. ATCGCAGCTTA. c. UAAGCUGCGAU. d. ATTCGACGCTA
Which of the following statements regarding photosynthesis and cellular respiration is false?
-Photosynthesis is an anabolic process, whereas cellular respiration is a catabolic process. -Oxygen is required in aerobic cellular respiration to assist in the oxidation of glucose. -The process of photosynthesis does not require the input of energy. -Photosynthesis fixes carbon dioxide during the Calvin cycle, whereas cellular respiration releases carbon dioxide during the Krebs cycle. -none of the above
Some organisms are capable of asexual or sexual reproduction. Under normal conditions, reproduction tends to be asexual. Why does reproduction tend to switch to a sexual mode during more stressful conditions?
A. asexual reproduction requires more energy to conduct B. Sexual reproduction is simple and more rapid, allowing more offspring C. Sexual reproduction reduces stress, because it derives nutrients mutually from two individuals D. sexual reproduction produces offspring with new combinations of chromosomes, increasing diversity