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Exam 4: Biology of the Cell

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Question 41

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Exocytosis is a form of secondary active transport.

A) True
B) False

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Question 42

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During transcription

A) an RNA molecule is formed as a DNA sequence is read.
B) a protein is formed as a DNA sequence is read.
C) a DNA sequence is formed as a RNA sequence is read.
D) an amino acid is transferred to a ribosome as a DNA sequence is read.
E) a protein is formed as a RNA sequence is read.

F) A) and C)
G) All of the above

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Question 43

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The sodium-potassium ATPase functions by performing

Some membrane proteins are not embedded within the lipid bilayer but are instead anchored loosely to either the inner or the outer surface.Such proteins are called _________ proteins.

The cytoskeleton has three separate components: microfilaments,intermediate filaments,and ______________.

The process of reading an mRNA molecule and synthesizing a protein is known as __________.

Which is a non-membrane-bound organelle

In order to process digested nutrients and detoxify chemical agents such as drugs and alcohol,the ______ contains abundant amounts of smooth ER.

_________ are barrel-shaped,protein-digesting organelles in both the nucleus and the cytoplasm.

Which is a passive transport process

In _____________ transport,substances move across a plasma membrane without the expenditure of energy by the cell.

All cells must obtain nutrients,form new chemical structures,and dispose of waste molecules.

Which of the following structures function in holding organelles in place,maintaining cell shape and rigidity,and directing organelle movement

The duplicated chromosome that appears during prophase consists of two genetically identical structures called sister ________________.

The potential across a cell membrane has changed drastically,from -90mV to +30mV.In other words,

What unit of measurement is often used to measure cell size

Channel-linked receptors are also known as __________ gated channels.

Under normal conditions and when a cell is at "rest," there is more potassium in the cytosol than in the extracellular fluid.

Identify the organelle that provides enzymes for autolysis.

_____________ ribosomes are responsible for the synthesis of proteins that remain within the cell.