What kind of enzyme is the RAS gene product, the Ras protein?

a) a phosphodiesterase
b) a GTPase
c) a kinase
d) an ATPase
e) a phosphatase


Ans: b) a GTPase

Biology & Microbiology

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Which of these statements is true?

a. Transport through carrier proteins occurs more rapidly than through channel proteins. b. Osmosis transports vitamins and nutrients through a cell’s plasma membrane. c. Aquaporins facilitate the transport of water through a cell’s plasma membrane. d. Ions pass through channel proteins by bonding to the protein’s inner surface.

Biology & Microbiology

In what ways do exotoxins usuall affect host cells?

a. Digesting intracellular fibers b. disrupting intracellular function c. causing lysis of cell d. dissolving the cell cement e. damaging the cell membrane

Biology & Microbiology

The maternal effect bicoid protein is a transcription factor that binds to the promoter of a zygotic gene to activate its expression. What is this second gene?

What will be an ideal response?

Biology & Microbiology

The retina contains light sensitive cells

____________________ Indicate whether the statement is true or false.

Biology & Microbiology