What is needed to estimate species relatedness with a molecular clock?
A. DNA accumulates mutations at a regular rate
B. known mutation rate for a gene
C. the number of differences in DNA sequences for a gene in two species
D. the same gene identified in two species
E. All answers are correct.
Answer: E. All answers are correct.
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Lysogeny probably carries a strong selective advantage for the host cell because it
A) prevents cell lysis. B) confers resistance to infection by viruses of the same type. C) confers resistance to infection by viruses of a different type (or strain). D) confers resistance to infection by many virus types and prevent cell lysis.
Which of the following is least likely to be involved in a cell localization regulatory mechanism?
A. steroid hormone receptors B. ubiquitination of proteins C. dephosphorylation of proteins D. sumoylation of proteins
The fact that the two alleles of each gene are packaged into separate gametes because they move apart from each other during gamete formation is Mendel's law of Select one:
a. independent assortment. b. crossing over. c. segregation. d. random fertilization. e. population dynamics.
Gram-negative bacteria in the genus ________ prey on other Gram-negative bacteria
A) Bdellovibrio B) Chlamydia C) Rickettsia D) Mycoplasma E) Caulobacter