Eugenics ____
a. has been scientifically tested and shown to be a valid theory
b. is a dubious method for improving the human species through selective breeding
c. assumes that human traits are much more influenced by environment than by genes
d. had major social ramifications in Germany but is largely dismissed in the United States
e. was based on faulty karyotyping and DNA analysis
ANSWER: b
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The products of exergonic pathways are usually:
a. lower in energy b. higher in energy c. larger and higher in energy d. smaller and higher in energy e. smaller and lower in energy
A facultative anaerobe can perform both aerobic and anaerobic respiration?
a. true b. false
Which of the following statements is false?
A) Translation consists of initiation, elongation, and termination. B) During polypeptide initiation, an mRNA molecule, the first amino acid attached to its tRNA, and the two subunits of a ribosome are brought together. C) The start codon can be different depending on what kind of protein is to be translated. D) During the first step of initiation, an mRNA molecule binds to a small ribosomal subunit.
You shake up a bottle of vinegar and oil dressing to mix it each time you use it. The reason you need to do this is that:
A) fat molecules are too large to dissolve in water. B) vinegar has an acidic pH and is neutralized when mixed with oil. C) oil is hydrophobic and won't dissolve in vinegar, so the oil and vinegar separate upon standing. D) vinegar and oil are oppositely charged, and opposites attract.