Certain amino acids are called essential because they ________

A) are required for making protein
B) cannot be made by the body from other compounds
C) store energy
D) are required for making nucleic acids


B

Biology & Microbiology

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Dideoxy nucleotides are used in which technique?

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Dolly the cloned sheep was conceived by inserting

a. a nucleus from an egg cell into an unfertilized egg. b. a nucleus from a body cell into an unfertilized egg. c. a nucleus from a sperm cell into an unfertilized egg. d. two nuclei from body cells into an enucleated egg cell. e. a nucleus from a body cell into an enucleated egg cell.

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Carotenoids are composed of isoprene subunits

__________________ Indicate whether the statement is true or false.

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What may be a result of the denaturation of proteins?

A. Formation of hydrogen bonds B. Loss of three-dimensional structure C. Removal of R groups from amino acids D. No change in enzyme activity E. Formation of covalent bonds

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