Question 1

During mitosis,two daughter cells form,each of which has

Accepted Answer

A) a different number of chromosomes than the original cell. 
B) twice as many chromosomes as the original cell. 
C) the same number of chromosomes as the original cell. 
D) a lesser number of chromosomes than the original cell. 
E) half as many chromosomes as the original cell. 
A) a different number of chromosomes than the original cell. 
B) twice as many chromosomes as the original cell. 
C) the same number of chromosomes as the original cell. 
D) a lesser number of chromosomes than the original cell. 
E) half as many chromosomes as the original cell.

Question 2

Thymine is replaced by which nitrogen base in RNA?

Accepted Answer

A) ribose 
B) uracil 
C) guanine 
D) thymine is not replaced in RNA 
E) cytosine 
A) ribose 
B) uracil 
C) guanine 
D) thymine is not replaced in RNA 
E) cytosine

Question 3

The proper distribution of a cell's genetic material to two daughter cells is accomplished by the process of ________.

Accepted Answer

The answer of The proper distribution of a cell's genetic...

Question 4

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

Accepted Answer

A) storage and release of calcium ions. 
B) modification of protein. 
C) synthesis of steroid hormones. 
D) synthesis of triglycerides. 
E) detoxification of drugs. 
A) storage and release of calcium ions. 
B) modification of protein. 
C) synthesis of steroid hormones. 
D) synthesis of triglycerides. 
E) detoxification of drugs.

Question 5

Figure 3-1 The Anatomy of a Representative Cell
Use Figure 3-1 to answer the following questions:
-Synthesis of carbohydrates and lipids occurs in the structure labeled

Accepted Answer

A) 4) 
B) 5) 
C) 6) 
D) 7) 
E) 8) 
A) 4) 
B) 5) 
C) 6) 
D) 7) 
E) 8)

Question 6

Put the following steps of protein synthesis in correct order of occurrence: 1. mRNA is produced in nucleus
2) ribosome moves along mRNA
3) DNA uncoils for transcription
4) polypeptide is produced
5) tRNA brings amino acids to ribosome
6) mRNA moves to ribosome

Accepted Answer

A) 3,1,6,2,5,4 
B)  2,4,6,1,3,5 
C)  2,1,5,4,3,6 
D)  3,5,1,6,2,4 
E)  1,5,3,4,2,6 
A) 3,1,6,2,5,4 
B)  2,4,6,1,3,5 
C)  2,1,5,4,3,6 
D)  3,5,1,6,2,4 
E)  1,5,3,4,2,6

Question 7

Components of the cytoskeleton may include all of the following,except

Accepted Answer

A) microfilaments. 
B) intermediate filaments. 
C) microsomes. 
D) microtubules. 
E) thick filaments. 
A) microfilaments. 
B) intermediate filaments. 
C) microsomes. 
D) microtubules. 
E) thick filaments.

Question 8

A solution that contains a lower osmotic pressure than the cytoplasm of a cell is called

Accepted Answer

A) merotonic. 
B) hypertonic. 
C) isotonic. 
D) hypotonic. 
E) homotonic. 
A) merotonic. 
B) hypertonic. 
C) isotonic. 
D) hypotonic. 
E) homotonic.

Question 9

Whenever positive and negative ions have been separated,a(n)________ will be produced.

Accepted Answer

potential

Question 10

A(n)________ is a mutant of a regulatory gene that causes cancer.

Accepted Answer

The answer of A(n)________ is a mutant of a regulatory...

Question 11

All of the following membrane transport mechanisms are passive processes,except

Accepted Answer

A) diffusion. 
B) facilitated diffusion. 
C) vesicular transport. 
D) osmosis. 
E) movement of water. 
A) diffusion. 
B) facilitated diffusion. 
C) vesicular transport. 
D) osmosis. 
E) movement of water.

Question 12

A gene is a set of specific instructions that

Accepted Answer

A) produces amino acids for proteins. 
B) copies DNA strands for mitosis. 
C) controls the process of mitosis. 
D) indicates the sequence of amino acids in a protein molecule. 
E) directs carbohydrate synthesis. 
A) produces amino acids for proteins. 
B) copies DNA strands for mitosis. 
C) controls the process of mitosis. 
D) indicates the sequence of amino acids in a protein molecule. 
E) directs carbohydrate synthesis.

Question 13

As each codon arrives at the active site of a ribosome,it attracts another molecule containing the anticodon.This molecule is called

Accepted Answer

A) DNA. 
B) mRNA. 
C) rRNA. 
D) tRNA. 
E) RER. 
A) DNA. 
B) mRNA. 
C) rRNA. 
D) tRNA. 
E) RER.

Question 14

The molecule that brings the proper amino acid into place at the ribosome for the elongation of a new protein is called

Accepted Answer

A) mRNA. 
B)  tRNA. 
C)  ATP. 
D)  Na-K. 
E)  rRNA. 
A) mRNA. 
B)  tRNA. 
C)  ATP. 
D)  Na-K. 
E)  rRNA.

Question 15

Osmotic pressure

Accepted Answer

A) forces water to move toward the higher solute concentration. 
B) forces water to move across a semipermeable membrane. 
C) can be opposed by hydrostatic pressure. 
D) increases as solute concentration increases. 
E) All the answers are correct. 
A) forces water to move toward the higher solute concentration. 
B) forces water to move across a semipermeable membrane. 
C) can be opposed by hydrostatic pressure. 
D) increases as solute concentration increases. 
E) All the answers are correct.

Question 16

Which form of endoplasmic reticulum modifies and packages newly synthesized proteins?

Accepted Answer

A) ribosomal endoplasmic reticulum 
B) proteosomes reticulum 
C) raised endoplasmic reticulum 
D) smooth endoplasmic reticulum 
E) rough endoplasmic reticulum 
A) ribosomal endoplasmic reticulum 
B) proteosomes reticulum 
C) raised endoplasmic reticulum 
D) smooth endoplasmic reticulum 
E) rough endoplasmic reticulum

Question 17

Compared to the extracellular fluid,cytosol contains

Accepted Answer

A) a higher concentration of potassium ions. 
B) a lower concentration of dissolved proteins. 
C) almost no glycogen. 
D) a higher concentration of amino acids. 
E) almost no lipids. 
A) a higher concentration of potassium ions. 
B) a lower concentration of dissolved proteins. 
C) almost no glycogen. 
D) a higher concentration of amino acids. 
E) almost no lipids.

Question 18

Which of the following about a cell's resting transmembrane potential is false?

Accepted Answer

A) inside slightly more positive than outside 
B) inside slightly more negative than outside 
C) depends on separation of + and - charges 
D) represents potential energy 
E) controls muscular contraction and nervous signaling 
A) inside slightly more positive than outside 
B) inside slightly more negative than outside 
C) depends on separation of + and - charges 
D) represents potential energy 
E) controls muscular contraction and nervous signaling

Question 19

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) coated with phospholipids for transport out of the nucleus. 
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) coated with phospholipids for transport out of the nucleus.

Question 20

Facilitated diffusion differs from ordinary diffusion in that

Accepted Answer

A) facilitated diffusion consumes no ATP. 
B) facilitated diffusion moves molecules from an area of higher concentration to lower concentration. 
C) the rate of molecular movement is limited by the number of available carrier molecules. 
D) facilitated diffusion never eliminates the concentration gradient. 
E) the rate of molecular movement is not limited by the number of available carrier molecules. 
A) facilitated diffusion consumes no ATP. 
B) facilitated diffusion moves molecules from an area of higher concentration to lower concentration. 
C) the rate of molecular movement is limited by the number of available carrier molecules. 
D) facilitated diffusion never eliminates the concentration gradient. 
E) the rate of molecular movement is not limited by the number of available carrier molecules.

Exam 3: The Cellular Level of Organization

During mitosis,two daughter cells form,each of which has

Thymine is replaced by which nitrogen base in RNA?

The proper distribution of a cell's genetic material to two daughter cells is accomplished by the process of ________.

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

Figure 3-1 The Anatomy of a Representative Cell Use Figure 3-1 to answer the following questions: -Synthesis of carbohydrates and lipids occurs in the structure labeled

Put the following steps of protein synthesis in correct order of occurrence: 1. mRNA is produced in nucleus 2) ribosome moves along mRNA 3) DNA uncoils for transcription 4) polypeptide is produced 5) tRNA brings amino acids to ribosome 6) mRNA moves to ribosome

Components of the cytoskeleton may include all of the following,except

A solution that contains a lower osmotic pressure than the cytoplasm of a cell is called

Whenever positive and negative ions have been separated,a(n)________ will be produced.

A(n)________ is a mutant of a regulatory gene that causes cancer.

All of the following membrane transport mechanisms are passive processes,except

A gene is a set of specific instructions that

As each codon arrives at the active site of a ribosome,it attracts another molecule containing the anticodon.This molecule is called

The molecule that brings the proper amino acid into place at the ribosome for the elongation of a new protein is called

Osmotic pressure

Which form of endoplasmic reticulum modifies and packages newly synthesized proteins?

Compared to the extracellular fluid,cytosol contains

Which of the following about a cell's resting transmembrane potential is false?

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

Facilitated diffusion differs from ordinary diffusion in that

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

The Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Articulations

Muscle Tissue

The Muscular System

Neural Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Neural Integration I: Sensory Pathways and the Somatic Nervous System

Neural Integration Ii: the Autonomic Nervous System and

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

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