Cells in the quiescent phase of the cell cycle are said to be in the _______ phase.
a. G0
b. G1
c. G2
d. M
Ans: a. G0
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Answer the following statements true (T) or false (F)
1. If sucrose is composed of both glucose and fructose, then sucrose must be a monosaccharide. 2. Lipids and carbohydrates can both be used by animals to store energy. 3. Saturated fats are composed of fatty acids with several double bonded carbons. 4. A polyunsaturated fat contains fatty acids with multiple double bonded carbons.
Enzymes needed to digest all types of macromolecules are found in
A. centrioles. B. Golgi apparatus. C. mitochondria. D. lysosomes.
The hypothesis that mitochondria and chloroplasts originated from the phagocytic activity of
prokaryotes that was not followed by digestion is called the
a. theory of natural selection. b. endosymbiotic hypothesis. c. ribozymes-first hypothesis d. Oparin-Haldane hypothesis. e. stromatolite hypothesis
Anna is conducting an experiment using a pH indicator that is red at low pH, green at neutral pH and purple at high pH. She starts with a green solution. When she adds compound X to her solution it turns purple. Then she adds compound Z to the solution and it turns green. She adds more Z, the solution remains green. These observations suggest X is ________ and Z is ________
A) a base; a buffer B) an acid; a base C) a base; a strong acid D) an acid; a buffer E) a buffer; a base