You arrive late to a biological seminar. However, just as you enter the room, you hear the speaker referring to the "five-prime end" and the "three-prime end" of a macromolecule. Immediately, you know that they are talking about a

A. protein.
B. lipid.
C. DNA.
D. carbohydrate.


Answer: C

Biology & Microbiology

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Natural selection exerts little or no effect on traits that appear during an individual’s ____

a. preadolescent years b. embryonic development c. juvenile phase d. postreproductive life e. reproductive life

Biology & Microbiology

What is the term for when the fluid inside and outside of a cell has the same osmolarity?

a. Hypotonic b. Isotonic c. Hypertonic d. Catatonic

Biology & Microbiology

The head of a sperm is capped with an organelle that contains glycoprotein-digesting enzymes. What is this organelle called?  

A.  zona pellucida B.  acrosome C.  granulosa D.  blastula E.  neural cap

Biology & Microbiology

The sliding filament model

a. supplies the energy needed for muscle contraction. b. provides a flexing action for the muscle fibers. c. describes the action of the actin and myosin in a muscle cell. d. explains muscle fatigue. e. only explains how muscles contract, not how they relax.

Biology & Microbiology