Which of the following is NOT a characteristic of the
plants with which Mendel worked?
a. They produce male and female parts.
b. They exhibit blending inheritance.
c. They normally self-fertilize.
d. They have many different contrasting traits and
exhibit some pure-breeding varieties.
e. They can easily be cross-fertilized by human
manipulation.
Answer: b
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All of the following choices delay or block expression of a gene except ________
a. expression of a microRNA complementary in sequence to the gene b. the binding of a repressor to certain sites on DNA c. methylation of DNA d. the binding of an activator to a promoter
Chromatids are
a. attached at the centriole. b. a pair of chromosomes, one from the mother and one from the father. c. attached at their centromeres. d. identical until crossing over occurs. e. attached at their centromeres and are identical until crossing over occurs.
Enzyme inhibition
A. refers to the interference with a chemical reaction caused by an enzyme. B. is the tendency to stop a chemical reaction caused by two different enzymes interfering with each other. C. is caused by a chemical that prevents the enzyme from acting on the natural substrate. D. is the ability of an enzyme to decrease the need for activation energy.
The pancreas, liver, and gallbladder connect to the digestive system at the:
A) ilium. B) secum. C) jejunum. D) duodenum.