If a pigment absorbed violet, yellow, orange, red, and green light, what color would it appear to be?
a. white
b. brown
c. black
d. blue
e. gray
ANSWER: d
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Which of the following is the highest (or most complex) level of structure for genetic material?
A. nucleotide B. double helix C. DNA D. gene E. chromosome
The lacA gene found within the lac operon encodes for galactosidase transacetylase. This enzyme attaches a(n) ________ group to lactose and lactose analogs.
A. amino B. hydroxyl C. carbonyl D. acetyl E. carboxyl
Which of the following statements is NOT true about the debate over the nature of genetic material?
A. Many scientists believed that DNA was not the genetic material because, with only four types of nucleotides, DNA did not have enough variability to store information. B. Some scientists thought that RNA was likely to be the genetic material. C. Scientists focused on carbohydrate and protein in their studies of possible genetic material since they knew that genes were on chromosomes and that chromosomes were made of carbohydrate and protein. D. Many scientists thought that proteins had a greater capacity for storing information because proteins contain 20 amino acids that could be sequenced differently.
The unique set of proteins located on the surface of cells that distinguish one organism from another are the ________
Fill in the blank(s) with correct word