In biology, many complementary processes exist. Explain how condensation reactions are complementary to
hydrolysis reactions.
What will be an ideal response?
ANSWER: In condensation reactions, a hydroxyl ion is removed from one reactant while a hydrogen ion
is removed from the other (collectively forming water). This allows the two reactants to
bind. In hydrolysis reactions, reactants are separated by adding a hydroxyl ion to one
reactant and a hydrogen ion to the other, using a water molecule.
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A permanent, inheritable change in the genetic information is called ________.
A. an alteration B. translation C. a mutation D. regeneration E. transcription
The monomer subunit of immunoglobulin molecules has all of the following except
A. a variable and constant region on each polypeptide chain. B. disulfide bonds between polypeptide chains. C. four antigen binding sites. D. two identical heavy polypeptide chains. E. two identical light polypeptide chains.
Many of the color varieties of summer squash are determined by several interacting loci: AA or Aa gives white, aaBB or aaBb gives yellow, and aabb produces green. Assume that two fully heterozygous plants are crossed. Give the phenotypes (with
frequencies) of the offspring. A) 12 white : 3 yellow : 1 green B) 3 white : 9 yellow : 4 green C) 4 white :9 yellow : 3 green D) 12 white : 1 yellow : 3 green E) 9 white : 3 yellow : 4 green
Cultures taken from an impetigo lesion reveal bacteria that are Gram-positive cocci which are catalase- and coagulase-negative and cause beta-hemolysis when cultured on blood agar. The responsible species is
A) Staphylococcus aureus. B) staphylococci species other than Staphylococcus aureus. C) Streptococcus pyogenes. D) Pseudomonas aeruginosa. E) Clostridium perfringens.