What macromolecule is composed entirely of beta-glucose units?

a. starch
b. chitin
c. glycogen
d. cellulose
e. protein


D

Biology & Microbiology

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Bat wings, human forearms, elephant legs, and cat forelimbs are collectively referred to as _____

a. analogous structures b. homologous structures c. vestigial structures d. homozygous structures e. heterozygous structures

Biology & Microbiology

A human embryo is capable of movement and has gonads that are distinguishable as either testes or ovaries by the end

of the:a. second week. b. fourth week. c. sixth week. d. eighth week. e. first trimester.

Biology & Microbiology

Which of the following is either consumed or synthesized in virtually every cellular reaction?

a. sugars b. enzymes c. DNA d. ATP

Biology & Microbiology

A bacterial genome is typically

A) a single linear piece of DNA. B) multiple linear pieces of DNA. C) a linear RNA molecule. D) a single circular DNA molecule. E) multiple circular DNA molecules.

Biology & Microbiology