Question 1

List the three types of RNA involved in protein synthesis.

Accepted Answer

A) codon RNA,anticodon RNA,and histone RNA 
B) carrier RNA,channel RNA,and transcript RNA 
C) enzymatic RNA,carrier RNA,and coding RNA 
D) messenger RNA,transfer RNA,and ribosomal RNA 
E) immature RNA,elongating RNA,and template RNA 
A) codon RNA,anticodon RNA,and histone RNA 
B) carrier RNA,channel RNA,and transcript RNA 
C) enzymatic RNA,carrier RNA,and coding RNA 
D) messenger RNA,transfer RNA,and ribosomal RNA 
E) immature RNA,elongating RNA,and template RNA

Question 2

Explain why cell division is important.

Accepted Answer

Cell division is important bec

Question 3

Which one of the following best defines differentiation?

Accepted Answer

A) the process of gradual structural and functional specialization of daughter cells 
B) cell growth 
C) fertilization of ovum by sperm 
D) maintenance of homeostasis at cellular level 
E) coordinated action of different cells 
A) the process of gradual structural and functional specialization of daughter cells 
B) cell growth 
C) fertilization of ovum by sperm 
D) maintenance of homeostasis at cellular level 
E) coordinated action of different cells

Question 4

Why is the genetic code described as a triplet code?

Accepted Answer

A) It is described as a triplet code because 3 ATP molecules are required to produce each protein. 
B) It is described as a triplet code because a sequence of three nitrogenous bases specifies the identity of a specific amino acid. 
C) It is described as a triplet code because a minimum of three amino acids are required to produce a functional protein. 
D) It is described as a triplet code because three RNA molecules participate in the transcription of the DNA. 
E) It is described as a triplet code because there are three nucleotides in DNA. 
A) It is described as a triplet code because 3 ATP molecules are required to produce each protein. 
B) It is described as a triplet code because a sequence of three nitrogenous bases specifies the identity of a specific amino acid. 
C) It is described as a triplet code because a minimum of three amino acids are required to produce a functional protein. 
D) It is described as a triplet code because three RNA molecules participate in the transcription of the DNA. 
E) It is described as a triplet code because there are three nucleotides in DNA.

Question 5

Describe the cell theory.

Accepted Answer

The cell theory states that cells are th

Question 6

Each of the following is a function of smooth endoplasmic reticulum  except

Accepted Answer

A) synthesis of glycogen. 
B) modification of protein. 
C) synthesis of steroid hormones. 
D) synthesis of triglycerides. 
E) synthesis of cholesterol. 
A) synthesis of glycogen. 
B) modification of protein. 
C) synthesis of steroid hormones. 
D) synthesis of triglycerides. 
E) synthesis of cholesterol.

Question 7

Breathing faster and deeper eliminates more carbon dioxide from the body than normal breathing.Under these circumstances,

Accepted Answer

A) more carbon dioxide will diffuse out of the blood in the lungs. 
B) more carbon dioxide will diffuse into the blood in the lungs. 
C) less carbon dioxide will diffuse out of the blood in the lungs. 
D) less carbon dioxide will diffuse into the blood in the lungs. 
E) the amount of carbon dioxide diffusion will remain unchanged. 
A) more carbon dioxide will diffuse out of the blood in the lungs. 
B) more carbon dioxide will diffuse into the blood in the lungs. 
C) less carbon dioxide will diffuse out of the blood in the lungs. 
D) less carbon dioxide will diffuse into the blood in the lungs. 
E) the amount of carbon dioxide diffusion will remain unchanged.

Question 8

What characteristic of phospholipids accounts for their packing into a double layer?

Accepted Answer

A) That they are amphipathic,containing a hydrophobic end and a hydrophilic end. 
B) That they are amphipathic,containing only hydrophilic structures. 
C) That they contain saturated fatty acids. 
D) That they contain unsaturated fatty acids. 
E) That they have rigid steroid ring structures. 
A) That they are amphipathic,containing a hydrophobic end and a hydrophilic end. 
B) That they are amphipathic,containing only hydrophilic structures. 
C) That they contain saturated fatty acids. 
D) That they contain unsaturated fatty acids. 
E) That they have rigid steroid ring structures.

Question 9

What type of integral protein allows water and small ions to pass through the plasma membrane?

Accepted Answer

A) anchoring protein 
B) recognition protein 
C) receptor protein 
D) carrier protein 
E) channel protein 
A) anchoring protein 
B) recognition protein 
C) receptor protein 
D) carrier protein 
E) channel protein

Question 10

The genetically programmed death of cells is called

Accepted Answer

A) differentiation. 
B) replication. 
C) apoptosis. 
D) metastasis. 
E) mitosis. 
A) differentiation. 
B) replication. 
C) apoptosis. 
D) metastasis. 
E) mitosis.

Question 11

Which of the following is an example of a nonmembranous organelle?

Accepted Answer

A) nucleus 
B) cilia 
C) endoplasmic reticulum 
D) peroxisomes 
E) mitochondria 
A) nucleus 
B) cilia 
C) endoplasmic reticulum 
D) peroxisomes 
E) mitochondria

Question 12

Which of the following statements about the Golgi apparatus is false?

Accepted Answer

A) It receives transport vesicles from the RER. 
B) It sends transport vesicles to the RER. 
C) It produces lysosomes. 
D) It supplies new membrane components. 
E) It produces secretory vesicles. 
A) It receives transport vesicles from the RER. 
B) It sends transport vesicles to the RER. 
C) It produces lysosomes. 
D) It supplies new membrane components. 
E) It produces secretory vesicles.

Question 13

What does the presence of many mitochondria imply about a cell's energy requirements?

Accepted Answer

A) The cell has high energy demand. 
B) The cell has low energy demand. 
C) The cell produces enough energy by glycolysis. 
D) The cell produces enough energy by fermentation. 
E) The cell has average energy demand. 
A) The cell has high energy demand. 
B) The cell has low energy demand. 
C) The cell produces enough energy by glycolysis. 
D) The cell produces enough energy by fermentation. 
E) The cell has average energy demand.

Question 14

Microfilaments do not

Accepted Answer

A) anchor the cytoskeleton to membrane proteins. 
B) control the consistency of cytoplasm. 
C) with myosin,produce cell movement. 
D) provide strength. 
E) form centrioles. 
A) anchor the cytoskeleton to membrane proteins. 
B) control the consistency of cytoplasm. 
C) with myosin,produce cell movement. 
D) provide strength. 
E) form centrioles.

Question 15

Channels

Accepted Answer

A) attach the plasma membrane to other structures in the cell. 
B) are detected by immune cells. 
C) have enzymatic functions. 
D) transport solutes across plasma membrane. 
E) permit the passage of water and small solutes. 
A) attach the plasma membrane to other structures in the cell. 
B) are detected by immune cells. 
C) have enzymatic functions. 
D) transport solutes across plasma membrane. 
E) permit the passage of water and small solutes.

Question 16

________ is the process of duplicating chromosomes prior to cell division.

Accepted Answer

A) DNA translation 
B) RNA translation 
C) DNA replication 
D) RNA replication 
E) DNA transcription 
A) DNA translation 
B) RNA translation 
C) DNA replication 
D) RNA replication 
E) DNA transcription

Question 17

The ________ of a membrane indicates how easy it is for substances to cross.

Accepted Answer

A) bilayer 
B) mosaic 
C) sensitivity 
D) permeability 
E) isolation 
A) bilayer 
B) mosaic 
C) sensitivity 
D) permeability 
E) isolation

Question 18

-In Figure 3-1,which structure is water most likely to pass through?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 8 
A) 1 
B) 2 
C) 3 
D) 4 
E) 8

Question 19

Describe why the nucleus is said to be the control center for a cell.

Accepted Answer

The nucleus is said to be the control ce

Question 20

Before the mRNA transcribed from a gene can be used to translate into a protein,it must be

Accepted Answer

A) edited to remove introns. 
B) edited to remove exons. 
C) transported into the cytoplasm. 
D) edited to remove introns and transported into the cytoplasm. 
E) edited to remove exons and transported into the cytoplasm. 
A) edited to remove introns. 
B) edited to remove exons. 
C) transported into the cytoplasm. 
D) edited to remove introns and transported into the cytoplasm. 
E) edited to remove exons and transported into the cytoplasm.

Exam 3: Cellular Level of Organization

List the three types of RNA involved in protein synthesis.

Explain why cell division is important.

Which one of the following best defines differentiation?

Why is the genetic code described as a triplet code?

Describe the cell theory.

Each of the following is a function of smooth endoplasmic reticulum except

Breathing faster and deeper eliminates more carbon dioxide from the body than normal breathing.Under these circumstances,

What characteristic of phospholipids accounts for their packing into a double layer?

What type of integral protein allows water and small ions to pass through the plasma membrane?

The genetically programmed death of cells is called

Which of the following is an example of a nonmembranous organelle?

Which of the following statements about the Golgi apparatus is false?

What does the presence of many mitochondria imply about a cell's energy requirements?

Microfilaments do not

Channels

________ is the process of duplicating chromosomes prior to cell division.

The ________ of a membrane indicates how easy it is for substances to cross.

-In Figure 3-1,which structure is water most likely to pass through?

Describe why the nucleus is said to be the control center for a cell.

Before the mRNA transcribed from a gene can be used to translate into a protein,it must be

An Introduction to Anatomy and Physiology

Chemical Level of Organization

Tissue Level of Organization

The Integumentary System

Bones and Bone Structure

The Skeleton

Joints

Skeletal Muscle Tissue

The Muscular System

Nervous Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain, cranial Nerves, and Sensory and Motor Pathways

The Autonomic Nervous System

The Special Senses

The Endocrine System

Blood

The Heart and Cardiovascular Function

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism, nutrition, and Energetics

The Urinary System

Fluid,electrolyte,and Acid-Base Balance

The Reproductive System

Development and Inheritance

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