What is the major carbohydrate-storage molecule in plants?
a. Starch
b. Cellulose
c. Glycogen
d. Deoxyribonucleic acid
Ans: a. Starch
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In a eukaryotic genome, DNA replication starts at
A) a single origin of replication. B) one replication fork per chromosome. C) nucleosomes. D) multiple sites along the length of each chromosome.
The formation of peptide bonds during translation is catalyzed by peptidyl transferase, an enzyme that
is
a. a protein in the small ribosomal subunit. b. part of an rRNA in the small ribosomal subunit. c. part of an rRNA in the large ribosomal subunit. d. a protein in the large ribosomal subunit. e. carried to the growing peptide chain by a tRNA
Which of these characteristics is not found in both land plants and green algae?
1.cellulose in their cell walls 2.produce spores in sporangia 3.store energy captured during photosynthesis as starch 4.light-absorbing pigments include both chlorophyll a and chlorophyll b
Which of the following is generally NOT a characteristic of all animals?
a) Usually undergo sexual reproduction. b) The adult form is diploid. c) Animals range from unspecialized single-celled to specialized multicellular forms. d) They ingest food that is digested in a central cavity. e) They produce an embryo that undergoes development in stages.