Which process uses proteins to move molecules against a concentration gradient?

A.) active transport
B.) passive transport
C.) endocytosis
D.) phagocytosis


Ans: A.) active transport

Biology & Microbiology

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Which of the following traits is determined by programmed transposition?

A) Pattern baldness in humans B) Mating types in yeast C) Eye color in Drosophila D) All of these E) None of these

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Phospholipase C catalyzes the reaction in which:a

PIP2 is split. b. IP3 is converted to DAG. c. a protein kinase is activated. d. DAG is converted to PIP2. e. calcium ions are released from the ER.

Biology & Microbiology

Which form of organization is classified between cell and organ?

a. atom b. molecule c. compound d. organelle e. tissue

Biology & Microbiology

When body temperature is too low, which of the following occurs?

A) Blood vessels in the skin constrict. B) Muscles relax. C) Sweat glands are activated. D) Blood vessels at the body surface dilate and fill with blood.

Biology & Microbiology