An organism has been found to contain a defective form of photolyase. What function might be impaired in this organism?
A. repair of DNA damage caused by UV light
B. recognition of damaged DNA by the UvrABC complex
C. stabilization of single-stranded DNA during DNA replication
D. lengthening of the tips of chromosomes
Answer: A
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In the illustration, what is the name for the numerous, short extensions emanating from the cell body?
a. axon hillocks
b. soma
c. dendrites
d. myelin
Which of the following diseases make up chronic obstructive pulmonary disease (COPD)?
Select one: a. emphysema, chronic bronchitis, and asthma b. emphysema, tuberculosis, and cystic fibrosis c. chronic bronchitis, tuberculosis, and pulmonary fibrosis d. tuberculosis, cystic fibrosis, and asthma e. pulmonary fibrosis, asthma, and cystic fibrosis
A DNA sequence that encodes for a specific product (ribonucleic acid [RNA] or protein) is defined as a:
a. gene. b. genome. c. nucleotide. d. deoxyribonucleic acid.
Infectious hepatitis (hepatitis A) is usually transmitted by
A. fecal-oral contamination of food or drink. B. contaminated blood. C. sexual activity. D. inhalation of droplets.