What is formed when an atom loses or gains an electron?
a. a molecule
b. an ion
c. a compound
d. a mixture
e. a solvent
B
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What occurs in a missense mutation? a. All of the amino acids beyond the mutation point are changed. b. A nucleotide is added to the DNA
c. A nucleotide is deleted from the DNA. d. A single amino acid is substituted for another in a protein. e. The protein is always completely nonfunctional.
A person with blood group A has both A and B type antibodies
a. True b. False
Describe experiments using marker molecules that have been done to elucidate important properties of (1) tight junctions and (2) gap junctions,
and propose one additional experiment you could do with each junction to gain a greater understanding of that junction's properties. What will be an ideal response?
Andalusian chickens with the genotype CBCB are black, those with the genotype CBCW are gray. What is the relationship between the CB and the CW alleles?
A) CB is dominant to CW. B) CB is recessive to CW. C) CW is dominant to CB. D) The relationship is one of incomplete dominance. E) CB and CW are codominant.