Ch. 4 BIO quiz

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Which of the following statements is false?

All cells are shaped like cubes or are round.

What part does SRP (signal recognition protein) play in the binding of ribosomes to the endoplasmic reticulum?

SRP binds first to the signal peptide on the polypeptide being synthesized and then to a receptor on the ER which opens a channel.

Eukaryotic cells are different from prokaryotic cells in which of the following ways?

The variety of organelles and their complexity.

As cells increase in size, which of the following occurs?

There will be a greater increase in volume than in the surface area of the cell.

The smallest living unit is a _____.

cell

The outermost boundary of prokaryotic cells is their _____.

cell wall

Large storage structures typically found in the center of plant cells are ______.

central vacuoles

Which of the following will NOT be found in abundance in an insulin-producing pancreas cell?

chloroplasts

Debris that is trapped in mucus is moved away from the lungs toward the throat by _____.

cilia

The infoldings of the inner membranes of mitochondria provide an increase in surface area and are important in ATP production during cellular respiration. Name these structures.

cristae

Sperm cells move by means of _______.

flagella

The stacks of membrane disks containing chlorophyll in a chloroplast are the ______.

grana

Which of these organelles contain hydrolytic enzymes responsible for intracellular digestion?

lysosomes

The description "9+2 array" in cells refers to _______.

microtubules

Skeletal muscle cells will have a large number of _____ due to their high demand for energy.

mitochondria

A dark-staining, spherical body found in the nucleus that produces ribosomal subunits is a ______:

nucleolus

All cells contain the following structures except ______.

nucleus

Protein synthesis in bacterial cells is performed by _____.

ribosomes

Synthesis of lipids occurs in which major organelle?

smooth ER

The endosymbiotic theory explains _____.

the origin of chloroplasts and mitochondria


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