What structure is a series of interacting organelles that function to make lipids, enzymes and proteins?
a. Cell membrane
b. Cytoplasm
c. Cell wall
d. Nuclear envelope
e. Endomembrane system
e
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Answer the following statements true (T) or false (F)
1. Studies by Avery, MacLeod, and McCarty with different strains of bacteria and those by Hershey and Chase with T2 bacteriophage determined that proteins are highly complex molecules that form the genetic material for bacteria and viruses. 2. A strand of DNA is composed of nucleotide bases, sulfate groups, and sugars. 3. When considering the complexity of genetic material, multiple genes are found within a chromosome. 4. If there is 28% adenine, then there must be 28% cytosine for the DNA composition of a particular organism. 5. DNA is a double helix structure whose strands are held together by hydrogen bonds with A to T and C to G base pairing.
The twin goals of systematics concern
a. taxonomy and ecology. b. phylogeny and taxonomy. c. phylogeny and ecology. d. taxonomy and disease control. e. phylogeny and disease control.
Most adolescents begin smoking
a. because of its stimulatory effects. b. because it makes them look sophisticated. c. due to the influence of celebrities. d. to defy their parents. e. as a result of social pressures.
Your roommate tells you that because she has no time to eat healthy foods, she is taking megadoses of vitamins. You warn her that this may be dangerous, because certain vitamins can accumulate in body fat
Megadoses of which of the following vitamins would be most likely to cause toxic effects? A) Vitamin C B) Vitamin E C) Folic acid D) Thiamin