Question 1

A group of cells was treated with a proteolytic (protein-digesting) enzyme. Which of the following processes would be least affected by this treatment?

Accepted Answer

A)  diffusion of sodium through sodium membrane channels 
B)  diffusion of lipid-soluble molecules through the plasma membrane 
C)  use of carrier molecules in facilitated diffusion 
D)  sodium-potassium exchange pump 
E)  secondary active transport 
A)  diffusion of sodium through sodium membrane channels 
B)  diffusion of lipid-soluble molecules through the plasma membrane 
C)  use of carrier molecules in facilitated diffusion 
D)  sodium-potassium exchange pump 
E)  secondary active transport

Question 2

DNA replication results in two new DNA molecules. Each of these new molecules

Accepted Answer

A)  has two newly synthesized strands of nucleotides. 
B)  has one strand of nucleotides from the parent DNA and one newly synthesized strand of nucleotides. 
C)  has two strands of nucleotides from the parent. 
D)  has a single strand of nucleotides. 
E)  are incomplete copies of the original. 
A)  has two newly synthesized strands of nucleotides. 
B)  has one strand of nucleotides from the parent DNA and one newly synthesized strand of nucleotides. 
C)  has two strands of nucleotides from the parent. 
D)  has a single strand of nucleotides. 
E)  are incomplete copies of the original.

Question 3

Nucleoli

Accepted Answer

A)  are located in the cytoplasm. 
B)  produce ribosomal subunits. 
C)  have a distinct membrane. 
D)  are important for the formation of the Golgi apparatus. 
E)  regulate movement of materials into the nucleus. 
A)  are located in the cytoplasm. 
B)  produce ribosomal subunits. 
C)  have a distinct membrane. 
D)  are important for the formation of the Golgi apparatus. 
E)  regulate movement of materials into the nucleus.

Question 4

If a toxic drug inhibited mRNA synthesis, which of the following would be most directly affected?

Accepted Answer

A)  protein synthesis 
B)  intracellular digestion 
C)  microtubule production 
D)  secretion of glycoproteins and lipoproteins 
E)  active transport 
A)  protein synthesis 
B)  intracellular digestion 
C)  microtubule production 
D)  secretion of glycoproteins and lipoproteins 
E)  active transport

Question 5

All of the chemical reactions within a cell are known as cell

Accepted Answer

A)  reproduction. 
B)  metabolism. 
C)  communication. 
D)  inheritance. 
E)  movement. 
A)  reproduction. 
B)  metabolism. 
C)  communication. 
D)  inheritance. 
E)  movement.

Question 6

A DNA nucleotide sequence that signals the beginning of a gene is called a

Accepted Answer

A)  transcription factor. 
B)  promoter. 
C)  triplet. 
D)  terminator. 
E)  RNA polymerase. 
A)  transcription factor. 
B)  promoter. 
C)  triplet. 
D)  terminator. 
E)  RNA polymerase.

Question 7

Which of the following organelles may or may not have ribosomes attached?

Accepted Answer

A)  endoplasmic reticulum 
B)  Golgi apparatus 
C)  nucleolus 
D)  peroxisomes 
E)  flagellum 
A)  endoplasmic reticulum 
B)  Golgi apparatus 
C)  nucleolus 
D)  peroxisomes 
E)  flagellum

Question 8

If a 0.9% NaCl (saline) solution is isotonic to a cell, then a solution of 3.5% NaCl would be

Accepted Answer

A)  hypertonic to the cell. 
B)  isotonic to the cell. 
C)  hypotonic to the cell. 
D)  catatonic to the cell. 
E)  All of these choices are correct. 
A)  hypertonic to the cell. 
B)  isotonic to the cell. 
C)  hypotonic to the cell. 
D)  catatonic to the cell. 
E)  All of these choices are correct.

Question 9

-Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is the condition of the RBC in solution "C"?

Accepted Answer

A)  hypotonic solution 
B)  hypertonic solution 
C)  isotonic solution 
D)  lyzed 
E)  crenated 
A)  hypotonic solution 
B)  hypertonic solution 
C)  isotonic solution 
D)  lyzed 
E)  crenated

Question 10

Which of the following is an organelle of locomotion?

Accepted Answer

A)  endoplasmic reticulum 
B)  Golgi apparatus 
C)  nucleolus 
D)  peroxisomes 
E)  flagellum 
A)  endoplasmic reticulum 
B)  Golgi apparatus 
C)  nucleolus 
D)  peroxisomes 
E)  flagellum

Question 11

Which mature cells do not have a nucleus?

Accepted Answer

A)  columnar cells of upper respiratory tract 
B)  spermatozoa 
C)  columnar cells of small intestines 
D)  red blood cells 
E)  macrophage (large, mobile white blood cell) 
A)  columnar cells of upper respiratory tract 
B)  spermatozoa 
C)  columnar cells of small intestines 
D)  red blood cells 
E)  macrophage (large, mobile white blood cell)

Question 12

A cell that breaks down and recycles proteins would have large numbers of

Accepted Answer

A)  rough ER. 
B)  lysosomes. 
C)  peroxisomes. 
D)  secretory vesicles. 
E)  proteosomes. 
A)  rough ER. 
B)  lysosomes. 
C)  peroxisomes. 
D)  secretory vesicles. 
E)  proteosomes.

Question 13

The second most abundant of the lipids in the plasma membrane is/are

Accepted Answer

A)  glycolipids. 
B)  saturated fats. 
C)  cholesterol. 
D)  phospholipids. 
E)  triglycerides. 
A)  glycolipids. 
B)  saturated fats. 
C)  cholesterol. 
D)  phospholipids. 
E)  triglycerides.

Question 14

Cells that respond to ligands

Accepted Answer

A)  possess receptor sites for specific ligands. 
B)  generally produce the ligands. 
C)  have lysosomes that destroy the ligands. 
D)  are using electrical signals in cellular communication. 
E)  are not functional. 
A)  possess receptor sites for specific ligands. 
B)  generally produce the ligands. 
C)  have lysosomes that destroy the ligands. 
D)  are using electrical signals in cellular communication. 
E)  are not functional.

Question 15

Which of the following would increase the rate of mediated transport?

Accepted Answer

A)  increase the number of available carrier molecules 
B)  change the shape of the binding site on the carrier molecule 
C)  increase the number of competitive molecules 
D)  fill all binding sites on carrier molecules 
E)  remove the binding site on the carrier molecule 
A)  increase the number of available carrier molecules 
B)  change the shape of the binding site on the carrier molecule 
C)  increase the number of competitive molecules 
D)  fill all binding sites on carrier molecules 
E)  remove the binding site on the carrier molecule

Question 16

What is the organelle where subunits of ribosomes are manufactured?

Accepted Answer

A)  endoplasmic reticulum 
B)  Golgi apparatus 
C)  nucleolus 
D)  peroxisomes 
E)  flagellum 
A)  endoplasmic reticulum 
B)  Golgi apparatus 
C)  nucleolus 
D)  peroxisomes 
E)  flagellum

Question 17

Mitochondria

Accepted Answer

A)  contains DNA. 
B)  have inner and outer membranes. 
C)  have inner folds called cristae. 
D)  are the cell's power plants. 
E)  All of these choices are correct. 
A)  contains DNA. 
B)  have inner and outer membranes. 
C)  have inner folds called cristae. 
D)  are the cell's power plants. 
E)  All of these choices are correct.

Question 18

Which of the following is CORRECTLY matched with its function?

Accepted Answer

A)  channel proteins - catalyze chemical reactions inside the cell 
B)  cell identity molecules - are primarily steroids 
C)  receptor proteins - move specific ions or molecules using ATP 
D)  peripheral proteins - penetrate the lipid bilayer from one surface to the other 
E)  carrier proteins - move bound ions or molecules from one side of the membrane to the other 
A)  channel proteins - catalyze chemical reactions inside the cell 
B)  cell identity molecules - are primarily steroids 
C)  receptor proteins - move specific ions or molecules using ATP 
D)  peripheral proteins - penetrate the lipid bilayer from one surface to the other 
E)  carrier proteins - move bound ions or molecules from one side of the membrane to the other

Question 19

The sequence of nucleotides in a messenger RNA molecule is needed to determine the sequence of

Accepted Answer

A)  nucleotides in a gene. 
B)  amino acids in a protein. 
C)  nucleotides in the anticodons of tRNA. 
D)  codons in DNA. 
E)  amino acids in DNA. 
A)  nucleotides in a gene. 
B)  amino acids in a protein. 
C)  nucleotides in the anticodons of tRNA. 
D)  codons in DNA. 
E)  amino acids in DNA.

Question 20

Which of the following is NOT a G-protein complex protein?

Accepted Answer

A)  delta 
B)  gamma 
C)  alpha 
D)  beta 
E)  None of these choices are correct. 
A)  delta 
B)  gamma 
C)  alpha 
D)  beta 
E)  None of these choices are correct.

Exam 3: Cell Biology

A group of cells was treated with a proteolytic (protein-digesting) enzyme. Which of the following processes would be least affected by this treatment?

DNA replication results in two new DNA molecules. Each of these new molecules

Nucleoli

If a toxic drug inhibited mRNA synthesis, which of the following would be most directly affected?

All of the chemical reactions within a cell are known as cell

A DNA nucleotide sequence that signals the beginning of a gene is called a

Which of the following organelles may or may not have ribosomes attached?

If a 0.9% NaCl (saline) solution is isotonic to a cell, then a solution of 3.5% NaCl would be

-Red blood cells (RBCs) have been placed in three different solutions: hypotonic, hypertonic, isotonic. What is the condition of the RBC in solution "C"?

Which of the following is an organelle of locomotion?

Which mature cells do not have a nucleus?

A cell that breaks down and recycles proteins would have large numbers of

The second most abundant of the lipids in the plasma membrane is/are

Cells that respond to ligands

Which of the following would increase the rate of mediated transport?

What is the organelle where subunits of ribosomes are manufactured?

Mitochondria

Which of the following is CORRECTLY matched with its function?

The sequence of nucleotides in a messenger RNA molecule is needed to determine the sequence of

Which of the following is NOT a G-protein complex protein?

The Human Organism

The Chemical Basis of Life

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System

Water, Electrolytes, and Acidbase Balance

Reproductive System

Development, Growth, Aging, and Genetics

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