Which of the following statements is not true concerning peptidyl transferase?
A) It is a ribozyme having catalytic activity.
B) It catalyzes peptide bond formation.
C) It moves the ribosome, so translation continues.
D) It is associated with the large subunit of ribosomes.
E) It requires no outside source of additional energy, such as ATP.
Answer: C
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Starch is used to store energy and cellulose is a structural polysaccharide. The key differences that explain these functions are:
A. cellulose with high branching aids strong structures, and starch with low branching makes for easy energy release. B. the unbranched structure of starch makes it easy to process for energy, and the branched structure in cellulose creates strong bonds. C. alpha 1-4 and alpha 1-6 glycosidic linkage in starch creates branching, and beta 1-4 in cellulose creates unbranched structures. D. beta 1-4 and alpha 1-6 glycosidic linkage of starch can create branches, and alpha 1-4 linkages in cellulose creates cellulose.
Which of the following are adaptations of fluid feeders that feed on the blood of other
animals?
a. piercing and sucking mouthparts b. production of anesthetic compounds c. production of anticoagulants d. all of these
Which early naturalist is known for describing nature as a continuum of organization?
a. Darwin b. Plato c. Mendel d. Galileo e. Aristotle
What is the structure that holds the chromatids together?
A) centromere B) chromatin C) chromosomes D) karyotype E) none of these