A general process of movement of molecules against a concentration gradient, which requires ATP, is ________
Fill in the blank(s) with the appropriate word(s).
active transport
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Using the techniques of genetic engineering, you design a cytoplasmic protein you want to accumulate within the ER of yeast cells. To accomplish this goal, you need to
A) do nothing; all proteins go through the ER. B) incorporate the appropriate mannose-6-phosphate groups. C) incorporate the appropriate DNA sequence with the proper signal. D) incorporate radioactive amino acids into the protein. E) incorporate the appropriate lipid groups into the lipoprotein.
If humans reproduced by parthenogenesis:a
males would need to produce more sperm. b. external fertilization would be necessary. c. the number of females in the population would most likely increase. d. the population would not reproduce asexually. e. no gametes would be produced.
Which of the following statements about mycorrhizae is/are true?
A. The presence of the fungi gives plants a greater absorptive surface for the intake of minerals. B. Plants are harmed, while fungi benefit. C. Fungi may enter the cortex of plant roots but do not enter the cytoplasm of plant cells. D. A and C are correct. E. A, B, and C are correct.
A red-eyed female fruit fly is crossed with a red-eyed male fruit fly. All of the female offspring have red eyes but only one-half of the male offspring are red-eyed. The other half of the male offspring have white eyes. In this example, eye color in fruit flies
A. is influenced by the environment. B. is an X-linked trait. C. is controlled by several genes. D. exhibits lack of dominance.