The length of a DNA sequence is _____ than the mature mRNA transcribed from it, because
A. shorter it does not contain exons.
B. equal it was transcribed from the DNA sequence.
C. longer it does not contain introns.
D. shorter each codon of three bases encodes only one amino acid.
E. longer each codon of one amino acid encodes three bases.
B. equal, it was transcribed from the DNA sequence.
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The accompanying hypothetical pedigree is for a family where some members have symptoms of Leigh syndrome, which is caused by an mtDNA mutation that reduces ATPase activity
Which of the following in the youngest generation might transmit the condition in the future? A) any of the women B) any of those affected C) any of the members of this generation D) only those with an affected mother E) any of the affected women
During an action potential, repolarization occurs _____
when sodium diffuses into the cell when potassium diffuses out of the cell when calcium ions diffuse into the synaptic knob only where sodium-potassium pumps are absent
Which of the following is not true of cellulitis?
A. It is caused by S. aureus or S. pyogenes. B. It causes pain, tenderness, swelling, and warmth. C. Surgery may be required for treatment. D. It affects the epidermis layer of the skin. E. Lymphangitis may occur with this infection.
During the growing season, when there is often 24 hours of daylight, plants and lichen cover the ground in which of the biomes?
a. boreal forest b. chaparral c. arctic tundra d. temperate grasslands