Which one of the following represents an actual Watson-Crick base pair with the largest number of hydrogen bonds?
A. adenine and cytosine
B. cytosine and guanine
C. thymine and guanine
D. cytosine and thymine
E. adenine and thymine
Answer B
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Mitosis separates chromosomes. Cytoplasm is divided between two daughter cells by _____
A) cloning B) cytokinesis C) binary fission D) the formation of kinetochores
Which DNA damaging agent can transfer methyl groups (—CH3) to the nucleotide bases in DNA?
a. UV light b. Chemicals in tobacco smoke c. Ionizing radiation d. X-rays e. Free radicals
Compare and contrast how invertebrates with a hydrostatic skeleton (earthworm) and an exoskeleton (fly) move
What will be an ideal response?
Which of the following requires aerobic conditions?
A) nitrogen fixation B) sludge digestion C) primary sewage treatment D) secondary sewage treatment E) water treatment