Both DNA and RNA
A) contain phosphate groups.
B) contain the same four types of nitrogen-containing bases.
C) are single-stranded molecules.
D) have the same five-carbon sugars.
E) cannot be present in a cell simultaneously.
A
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What type of receptor is not an enzyme, but is directly associated with an enzyme that can hydrolyze GTP?
A. Channel-linked receptor B. Enzymatic receptor C. G protein-coupled receptor D. Steroid hormone receptor
Alleles for other genetic diseases also provide protection against malaria when only one copy of the allele is present. In what cell type would you expect these genes to be active?
A) liver cells B) skin cells C) red blood cells D) lung cells
What molecule must be added to the media for a strain of bacteria auxotrophic for alanine to grow?
A) Alanine B) Tryptophan C) Hisitidine D) Biotin
Which of the following is characterized by weakness, fatigue, decreased blood pressure, blurred vision and pale clammy skin?
What will be an ideal response?