A/an ________ is the protein shell around the nucleic acid core of a virus.
A. spike
B. monolayer
C. capsid
D. envelope
E. capsomere
Answer: C
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Which of the following polymerases functions in translesion synthesis and is considered error-prone because it lacks the 3'-5' exonuclease activity used for proofreading?
A. DNA Pol I B. DNA Pol II C. DNA Pol III D. DNA Pol IV E. None of these choices is correct.
Lisa has a rare genetic defect that causes acute sun-sensitivity. Her mother has the defect, but her father does not. All of Lisa's siblings, two brothers and a sister, are also affected. All four siblings are married, but none of their spouses has the mutant gene. Draw a pedigree for this family. Identify and explain the most likely mode of transmission for this disorder
What will be an ideal response?
Which statement about the internal biological clock is false?
a. It is known as a circadian rhythm. b. It relates to the opening and closing of stomata. c. It includes the sleep movements observed in some plants, such as beans. d. It may involve both phytochrome and cryptochrome. e. It disappears totally if it is not reset by the rising and setting sun.
Immediately after a meal, which one of the following is first used by cells as an energy source?
A) fat
B) glycogen
C) lactic acid
D) amino acids
E) glucose