Which of the following adds RNA nucleotides, one at a time, during transcription?
a. RNA polymerase
b. DNA polymerase
c. RNA nuclease
d. transfer RNA
e. ribosomal RNA
ANSWER: a
Biology & Microbiology
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In the accompanying figure, the structure labeled “H” is a ____
a. muscle fiber b. sarcoplasmic reticulum c. mitochondria d. myofibril e. Z line
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The order of amino acids is the ____ structure of proteins
a. primary b. secondary c. tertiary d. quaternary e. stereo
Biology & Microbiology
Select all features that first appear between three and four months of human development.
a. fingernails b. nipples c. male or female gonads d. All of the above
Biology & Microbiology
Which of the following particles could diffuse easily through a cell membrane?
a. Oxygen b. Sodium ion c. Hydrogen ion d. Glucose
Biology & Microbiology