Insertion and deletion mutations can be caused by
A) spontaneous hydrolysis reactions between DNA and water.
B) intercalating agents.
C) the addition of DNA adducts.
D) tautomeric shift.
E) spontaneous hydrolysis reactions between DNA and water or the addition of DNA adducts.
Answer: B
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Which one of the following statements best represents the relationship between cellular respiration and photosynthesis?
A. Photosynthesis stores energy in organic molecules, while respiration releases it. B. Photosynthesis occurs only during the day and respiration occurs only at night. C. Respiration occurs only in animals and photosynthesis occurs only in plants. D. Respiration stores energy in organic molecules, while photosynthesis releases it. E. Photosynthesis reverses the biochemical pathways of respiration.
Repeated sequences make DNA sequencing challenging for of all of the following reasons EXCEPT:
A. repeated sequences are typically longer than the short sequences obtained by automated sequencing. B. there is no easy way to determine how many copies of the same repeat are present within one chromosome. C. short repeats may fold back upon themselves to form a double-stranded structure that is not easily sequenced. D. the long repeats often have mutations that are not easily sequenced. E. All of the answer options are challenges to DNA sequencing due to repeated sequences.
Which of these statements best illustrates the theory of catastrophism?
A) Only extinct species appear in the fossil record. B) The fossil record is incomplete. C) Only plant species have become extinct. D) There are no humans in early fossil records because they had not been created yet. E) Species become extinct due to natural disasters, such as floods and volcanic eruptions.
Frog eggs most closely resemble
A. alligator eggs. B. platypus eggs. C. fish eggs. D. chicken eggs.