Which of the following statements about nutrition and digestion is true?
a. Feeding and digestion are synonyms.
b. Chemical digestion typically precedes mechanical digestion in carnivores.
c. During absorption, small molecules such as amino acids and simple sugars enter cells.
d. Elimination rids the body of excessive nutrients
e. Small sugars are joined by enzymatic hydrolysis to form large carbohydrates.
Answer: c. During absorption, small molecules such as amino acids and simple sugars enter cells.
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Assuming incomplete dominance, if a homozygous red-flowered plant is crossed with a homozygous white-flowered plant, what will be the color of the offspring?
A. White B. Pink C. Red D. Red and white
Protozoa, algae, and fungus are typically found near the surface of soil
Indicate whether this statement is TRUE or FALSE.
Why is Taq polymerase used in a polymerase chain reaction (PCR)?
A. Taq polymerase has proofreading activity and thus makes fewer errors than other DNA polymerases. B. Unlike other DNA polymerases, Taq polymerase is heat stable and survives the 94 degree denaturation step in PCR. C. Unlike other DNA polymerases, Taq polymerase is not inhibited by dideoxy nucleotides. D. Taq polymerase can produce DNA from an RNA template, unlike other DNA polymerases. E. Taq polymerase is more efficient than other DNA polymerases.
What process allows bacteria to absorb external organic matter across the cell wall?
a. Exoenzyme b. Osmosis c. Mitosis d. Osmotrophy