Question 1

Myocardium (cardiac muscle tissue)must rhythmically contract for a lifetime.This requires a considerable amount of energy production by the cells.You would expect to see a relatively high amount of which organelle in these cells?

Accepted Answer

A)  cytoskeleton 
B)  smooth endoplasmic reticulum 
C)  mitochondria 
D)  lysosomes

Question 2

A gene can best be defined as ________.

Accepted Answer

A)  a segment of DNA that carries the instructions for one polypeptide chain 
B)  a three-base triplet that specifies a particular amino acid 
C)  noncoding segments of DNA up to 100,000 nucleotides long 
D)  an RNA messenger that codes for a particular polypeptide

Question 3

Which of the following statements is correct regarding RNA?

Accepted Answer

A)  rRNA is always attached to the rough ER. 
B)  If the base sequence of DNA is ATTGCA, the messenger RNA template will be UCCAGU. 
C)  There is exactly one specific type of mRNA for each amino acid. 
D)  Messenger RNA, transfer RNA, and ribosomal RNA play a role in protein synthesis.

Question 4

A type of transport protein found in the plasma membrane of cells lining the inside of the intestine allows sodium ions to diffuse down their concentration gradient.The ions move through the transport protein,and into the cell.These transport proteins will use the kinetic energy of the diffusing sodium ions to bring glucose into the cells as well.Which of the following would stop transport of glucose through this transport protein?

Accepted Answer

A)  Increasing the number of digestive enzymes in the digestive tract. 
B)  Stopping the activity of the sodium potassium pump. 
C)  Increasing the concentration of glucose outside of the cell. 
D)  Lowering the energy of activation.

Question 5

Which of the following is a function of a plasma membrane protein?

Accepted Answer

A)  molecular transport through the membrane 
B)  forms a lipid bilayer 
C)  circulating antibody 
D)  oxygen transport

Question 6

Match the following:
-Chromosomes uncoil to form chromatin.

Accepted Answer

A) Anaphase 
B) Late prophase 
C) Telophase 
D) Early prophase 
E) Metaphase

Question 7

What are cell exons and introns?

Accepted Answer

The answer of What are cell exons and introns?...

Question 8

A type of transport protein found in the plasma membrane of cells lining the inside of the intestine allows sodium ions to diffuse down their concentration gradient.The ions move through the transport protein,and into the cell.These transport proteins will use the kinetic energy of the diffusing sodium ions to bring glucose into the cells as well.This transport protein would best be described as ________.

Accepted Answer

A)  a carrier protein 
B)  a symporter 
C)  a pump 
D)  a channel

Question 9

Microfilaments are thin strands of the contractile protein composed of myosin.

Accepted Answer

A) True 
 B)False

Question 10

Figure 3.2
Using Figure 3.2, match the following:
-Peripheral protein.

Accepted Answer

A) A 
B) E 
C) C 
D) D 
E) B

Question 11

The functions of centrioles include ________.

Accepted Answer

A)  producing ATP 
B)  serving as the site for ribosomal RNA synthesis 
C)  providing a whiplike beating motion to move substances along cell surfaces 
D)  organizing the mitotic spindle in cell division

Question 12

Concentration differences cause ionic imbalances that polarize the cell membrane,and active transport processes.

Accepted Answer

A) True 
 B)False

Question 13

Osmosis is the passive movement of water but it follows almost completely opposite laws of physics when compared to the diffusion of ions or other small particles.

Accepted Answer

A) True 
 B)False

Question 14

Match the following:
-Nuclear membrane and nucleolus disintegrate.

Accepted Answer

A) Anaphase 
B) Late prophase 
C) Telophase 
D) Early prophase 
E) Metaphase

Question 15

Match the following:
-Chromosomes align on the spindle equator.

Accepted Answer

A) Anaphase 
B) Late prophase 
C) Telophase 
D) Early prophase 
E) Metaphase

Question 16

Other than the nucleus,which organelle has its own DNA?

Accepted Answer

The answer of Other than the nucleus,which organelle has its...

Question 17

Match the following:
-Chromosomal centromeres split and chromosomes migrate to opposite ends of the cell.

Accepted Answer

A) Anaphase 
B) Late prophase 
C) Telophase 
D) Early prophase 
E) Metaphase

Question 18

The speed of individual particle diffusion is influenced by temperature and particle size,not by concentration.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following structures would aid a cell in allowing more nutrients to be absorbed by the cell?

Accepted Answer

A)  stereocilia 
B)  flagella 
C)  primary cilia 
D)  microvilli

Question 20

Figure 3.1
Using Figure 3.1, match the following:
-Site of enzymatic breakdown of phagocytized material.

Accepted Answer

A) C 
B) E 
C) D 
D) A 
E) B

Exam 3: Cells: the Living Units

Myocardium (cardiac muscle tissue) must rhythmically contract for a lifetime.This requires a considerable amount of energy production by the cells.You would expect to see a relatively high amount of which organelle in these cells?

A gene can best be defined as ________.

Which of the following statements is correct regarding RNA?

Which of the following is a function of a plasma membrane protein?

Match the following: -Chromosomes uncoil to form chromatin.

What are cell exons and introns?

Microfilaments are thin strands of the contractile protein composed of myosin.

Figure 3.2 Using Figure 3.2, match the following: -Peripheral protein.

The functions of centrioles include ________.

Concentration differences cause ionic imbalances that polarize the cell membrane,and active transport processes.

Osmosis is the passive movement of water but it follows almost completely opposite laws of physics when compared to the diffusion of ions or other small particles.

Match the following: -Nuclear membrane and nucleolus disintegrate.

Match the following: -Chromosomes align on the spindle equator.

Other than the nucleus,which organelle has its own DNA?

Match the following: -Chromosomal centromeres split and chromosomes migrate to opposite ends of the cell.

The speed of individual particle diffusion is influenced by temperature and particle size,not by concentration.

Which of the following structures would aid a cell in allowing more nutrients to be absorbed by the cell?

Figure 3.1 Using Figure 3.1, match the following: -Site of enzymatic breakdown of phagocytized material.