Which nitrogenous base percentage is complementary to the 22% guanine found in a double-stranded DNA molecule?
A) 22% thymine
B) 22% cytosine
C) 44% adenine
D) 48% thymine
B
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Which proteins would be considered peripheral proteins?
a. aquaporins b. cell adhesion proteins c. carrier proteins d. microtubules e. receptors
Refer to the accompanying figure. Which best describes what is happening to the red blood cells in Figure A?
a. Pinocytosis has occurred. b. Plasmolysis has occurred. c. There has been no net water movement. d. There has been a net flow of water out of the cell. e. There has been a net flow of water into the cell.
Choose the letter of the best match from the following:A. birth control pillB. intrauterine deviceC. diaphragmD. foams and jelliesE. vasectomyPrevention of egg maturation and ovulation.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements is true?
A) Gymnosperms have seeds that are not enclosed in a protective casing, while angiosperms have flowers that produce seeds with a protective casing. B) Gymnosperms have flowers that produce seeds with a protective casing, while angiosperms have seeds that are not enclosed in a protective casing. C) Gymnosperms lack true roots and leaves, while angiosperms lack lignin cell walls. D) Gymnosperms lack seeds, while angiosperms have flowers that produce seeds with a protective casing.