In general, a cell receiving a message undergoes three stages of cell signaling. What are these stages?
a. paracrine, autocrine, and local
b. signal reception, signal transduction, and cellular response
c. signal reception, nucleus disintegration, and apoptosis
d. signal reception, cellular response, and cell division
e. the alpha, beta, and gamma
ANSWER: b
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Every population has a characteristic
a. size. b. density. c. distribution. d. number of individuals in its various age categories. e. all of these.
ATP
a. can be produced by endocytosis. b. is the by-product of the biosynthesis of organic compounds such as glucose. c. is produced in greatest amounts during anaerobic respiration. d. is released in aerobic respiration. e. is released in anaerobic respiration.
At the growing end of a DNA chain, DNA polymerase catalyzes the formation of a disulfide bond between the 3'-OH group of the deoxyribose on the last nucleotide and the 5'-phosphate of the dNTP precursor
Indicate whether the statement is true or false
Your house plant is growing slowly and lacks its normal bright green color, so you call a botanist for advice. She suggests that the plant may be deficient in magnesium (Mg2+). Why are these symptoms associated with Mg2+ deficiency?
A) Mg2+ is important in the structure of many amino acids. B) Lack of Mg2+ in the soil allows pathogenic bacteria to grow. C) Mg2+ is a cofactor for NADPH function. D) Mg2+ is an important component in chlorophyll. E) Cytochromes require Mg2+ to function properly.