Ch 6: Eukaryotic Cells (Princeton Review)

Question 1

What are rods formed in the cytoplasm from polymerization of the globular protein ACTIN?

Answer 1

microfilaments

Question 2

Molecules that are smaller than __ kilodaltons, including small proteins, can freely diffuse from the cytoplasm into the nucleus through the nuclear pores. Larger proteins cannot pass freely through nuclear pores and are excluded from the nuclear interior unless they contain a sequence of basic amino acids called a _______ ________ ________.

Answer 2

60 kilodaltons

nuclear localization sequence

p. 176

Question 3

The nucleolus is a region within the nucleus which functions as a ________ _______. There is no membrane that separates the nucleolus from the rest of the nucleus.

Answer 3

ribosome factory

p. 176

Question 4

How many types of RNA polymerase do bacteria have?

Answer 4

They have only a single kind which is responsible for all transcription.

p. 176

Question 5

A family of proteases, referred to as ________, is responsible for carrying out the events of apoptosis. They have a cysteine in their active site and they cleave their target proteins at aspartic acid sites… hence their name (c-asp-ases).

Answer 5

caspases

p. 212

Question 6

Extracellular or intracellular death signals cluster together to cause activation of ________ caspases. An amplification cascade follows, which causes effector caspases to ______ a variety of cellular proteins that triggers apoptosis.

Answer 6

initiator
cleave

p. 212