Question 1

Which of the following is NOT a form of RNA used in protein synthesis?

Accepted Answer

A) Messenger RNA 
B) Complementary RNA 
C) Transfer RNA 
D) Ribosomal RNA

Question 2

The presence of cholesterol molecules in plasma membranes is to

Accepted Answer

A) allow the buildup of fats. 
B) change the chemical nature of the membrane. 
C) create a mosaic pattern. 
D) stabilize the phospholipids at low temperatures.

Question 3

Water intoxication can be due to

Accepted Answer

A) loss of too much water. 
B) excessive sweating. 
C) excessive consumption of pure water. 
D) excessive consumption of low-sodium sports drinks.

Question 4

The term 'tonicity' refers to

Accepted Answer

A) the concentration of solutes that determines the movement of water. 
B) the separation of one cell into two daughter cells. 
C) the secretion of products outside of the cell through the plasma membrane. 
D) the movement of water across a membrane.

Question 5

The chromosomes line up randomly at the equator of the cell during

Accepted Answer

A) prophase. 
B) metaphase. 
C) anaphase. 
D) telophase.

Question 6

The material that is replicated prior to cell division is called

Accepted Answer

A) RNA. 
B) protein. 
C) DNA. 
D) ATP.

Question 7

The period of interphase when DNA is replicated is the

Accepted Answer

A) G1 phase. 
B) S phase. 
C) G2 phase. 
D) mitosis phase.

Question 8

What structure anchors cilia and flagella?

Accepted Answer

A) Microvilli 
B) Basal body 
C) Hilus 
D) Hillock

Question 9

Which of the following function(s)in protein production?

Accepted Answer

A) Ribosomes 
B) Golgi apparatus 
C) Rough ER 
D) Ribosomes,Golgi apparatus,and rough ER

Question 10

Which elements of the cytoskeleton help maintain the shape of the cells,move organelles around,and aid in cell division?

Accepted Answer

A) Intermediate fibers 
B) Cilia 
C) Microtubules 
D) Actin filaments

Question 11

The process of programmed cell death due to problems in the cell cycle is called

Accepted Answer

A) mitosis. 
B) apoptosis. 
C) phagocytosis. 
D) endocytosis.

Question 12

What is the function of intermediate filaments?

Accepted Answer

A) Cell-to-cell junctions 
B) Cell movement 
C) Form flagella 
D) Cell shape

Question 13

The movement of materials into a cell by the formation of a pocket of the plasma membrane is called

Accepted Answer

A) exocytosis. 
B) hemolysis. 
C) crenation. 
D) endocytosis.

Question 14

Filtration

Accepted Answer

A) pushes material out of the blood. 
B) uses blood pressure to move fluids. 
C) can separate large particles from small particles. 
D) All apply.

Question 15

A system of membranous channels and saccules that runs from the nuclear membrane through the cytoplasm is the

Accepted Answer

A) nucleolus. 
B) Golgi apparatus. 
C) endoplasmic reticulum. 
D) mitochondria.

Question 16

When a substance cannot cross the plasma membrane by itself,and instead uses a protein carrier to move from high to low concentration,it uses

Accepted Answer

A) facilitated diffusion. 
B) active transport. 
C) osmosis. 
D) simple diffusion.

Question 17

The division of the cytoplasm and organelles is called

Accepted Answer

A) cytokinesis. 
B) mitosis. 
C) interphase. 
D) telophase.

Question 18

A carrier protein is required

Accepted Answer

A) for passive transport. 
B) for active transport. 
C) to move water. 
D) for passive transport and to move water.

Question 19

What is the function of DNA polymerase?

Accepted Answer

A) Breaks hydrogen bonds between DNA strands 
B) Joins nucleotides of the complementary DNA strand 
C) Joins amino acids to form a protein 
D) None apply.

Question 20

The phospholipid molecules are arranged with

Accepted Answer

A) the hydrophilic tails facing outward and the hydrophobic heads facing inward. 
B) the hydrophilic tails facing inward and the hydrophobic heads facing outward. 
C) the hydrophilic heads facing outward and the hydrophobic tails facing inward. 
D) the hydrophilic heads facing inward and the hydrophobic tails facing outward.

Exam 3: Cell Structure and Function