You are studying an enzyme-catalyzed reaction that induces a particular cellular activity in the lab. If you wanted to slow down that particular cellular activity by controlling the enzyme, what could you do?
A. Decrease the temperature of the incubator where the cells are growing
B. Increase the pH of the media the cells are growing in to the optimum pH
C. Add cofactors to the media the cells are growing in
D. Add an allosteric activator to the cells
A. Decrease the temperature of the incubator where the cells are growing
Decreasing the temperature could work to slow down the reaction. All of these other choices would either increase or maintain the rate of the reaction.
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If an organism has a single copy of each chromosome, then it is
A. aneuploidy. B. diploid. C. haploid. D. tetraploid. E. polyploidy.
Which of the following statements is TRUE?
a. Each new cell receives half of the number of chromosomes in the original cell. b. Each new cell receives copies of all the original chromosomes. c. If the original number of chromosomes was 46, each new cell will have 23. d. The sister chromosomes are not identical due to breakages in the DNA. e. All chromosomes are duplicated except the sex chromosomes.
A wound to the skin may become swollen, red, and hot to the touch. These three responses are part of the ________
Fill in the blank(s) with correct word
Which statement about biomes, the major terrestrial ecosystems covering the Earth, is true?
A) Each of the ten major biomes is restricted to just one or two continents. B) The major factors affecting the distribution of biomes are wind and sunlight. C) Most natural biomes are unaffected by human activity. D) Fire is important in some biomes because it creates openings.