Question 1

During this phase of cell division,organelles duplicate and centrosome replication begins.

Accepted Answer

A) interphase 
B) prophase 
C) metaphase 
D) anaphase 
E) telophase 
A) interphase 
B) prophase 
C) metaphase 
D) anaphase 
E) telophase A

Question 2

Briefly describe the driving force for the movement of water across plasma membranes.

Accepted Answer

Water moves across membranes by osmosis,which is driven by solute concentration differences across the membrane.Water moves from the area of low solute concentration to the area of high solute concentrations.

Question 3

Which portion of a DNA segment does not code for a protein?

Accepted Answer

A) RNA 
B) introns 
C) exons 
D) polyribosome 
E) ribosome 
A) RNA 
B) introns 
C) exons 
D) polyribosome 
E) ribosome B

Question 4

Which of the following types of membrane proteins function by recognizing and binding to hormones and neurotransmitters?

Accepted Answer

A) transporters 
B) receptors 
C) enzymes 
D) linkers 
E) cell identification markers 
A) transporters 
B) receptors 
C) enzymes 
D) linkers 
E) cell identification markers

Question 5

In the diagram,which organelle aids movement of the cell?

Accepted Answer

A) A 
B) G 
C) H 
D) D 
E) I 
A) A 
B) G 
C) H 
D) D 
E) I

Question 6

Drugs that are large in size are not able to cross a membrane.[dropdown 1] involves engulfment of a drug by the cell membrane and transports it inside the cell by pinching off the filled vesicle.Vitamin B12 is transported this way.Many neurotransmitters, like norepinephrine,are stored in vesicles and released to the outside of the cell by [dropdown 1].
Dropdown Choices:
Endocytosis
Exocytosis
Facilitated diffusion
Osmosis
Simple diffusion

Accepted Answer

1.enodcyto

Question 7

If the solute concentration is greater inside of the cell than outside the cell,water will move by osmosis

Accepted Answer

A) into the cell. 
B) out of the cell. 
C) into and out of the cell at the same rate resulting in no net water movement. 
D) All of these answer choices are correct. 
E) None of these answers are correct. 
A) into the cell. 
B) out of the cell. 
C) into and out of the cell at the same rate resulting in no net water movement. 
D) All of these answer choices are correct. 
E) None of these answers are correct.

Question 8

Which of the following protects the contents of the nucleus?

Accepted Answer

A) nucleic acids 
B) nuclear membrane 
C) centrosome 
D) cilia 
E) Golgi complex 
A) nucleic acids 
B) nuclear membrane 
C) centrosome 
D) cilia 
E) Golgi complex

Question 9

Which of the following transport processes uses vesicles that fuse with the plasma membrane to secrete materials into the extracellular fluid?

Accepted Answer

A) endocytosis 
B) exocytosis 
C) facilitated diffusion 
D) osmosis 
E) Both endocytosis and exocytosis. 
A) endocytosis 
B) exocytosis 
C) facilitated diffusion 
D) osmosis 
E) Both endocytosis and exocytosis.

Question 10

Which of the following membrane-enclosed organelles can engulf a worn-out organelle,digest its chemical components,and recycle those digested components?

Accepted Answer

A) peroxisomes 
B) mitochondria 
C) proteasome 
D) ribosomes 
E) lysosomes 
A) peroxisomes 
B) mitochondria 
C) proteasome 
D) ribosomes 
E) lysosomes

Question 11

The three main components of the lipid bilayer portion of a plasma membrane are

Accepted Answer

A) phospholipids,glycoproteins,and water. 
B) proteins,cholesterol,and fatty acids. 
C) cholesterol,triglycerides,and glycolipids. 
D) phospholipids,cholesterol,and glycolipids. 
E) phospholipids,cholesterol,and proteins. 
A) phospholipids,glycoproteins,and water. 
B) proteins,cholesterol,and fatty acids. 
C) cholesterol,triglycerides,and glycolipids. 
D) phospholipids,cholesterol,and glycolipids. 
E) phospholipids,cholesterol,and proteins.

Question 12

Which of the cells in the diagram contains structural adaptations that increase surface area for absorption?
1 B
2 C
3 D
4 E

Accepted Answer

A) 3 and 4 
B) 1 only 
C) 2 only 
D) 3 only 
E) 4 only 
A) 3 and 4 
B) 1 only 
C) 2 only 
D) 3 only 
E) 4 only

Question 13

If there are 23 pairs of chromosomes in a human cell,[dropdown 1] chromosomes will be present in each cell during prophase I of meiosis.[dropdown 2] chromosomes will be present in each cell during prophase II.
Dropdown Choices:
23
46
92

Accepted Answer

The answer of If there are 23 pairs of chromosomes...

Question 14

What is the major function of histones?

Accepted Answer

A) needed for double helix formation of the DNA 
B) synthesis of ribosomal subunits 
C) help organize coiling and folding of the DNA 
D) degrade faulty proteins in the nucleus 
E) control passage of substances through nuclear envelope 
A) needed for double helix formation of the DNA 
B) synthesis of ribosomal subunits 
C) help organize coiling and folding of the DNA 
D) degrade faulty proteins in the nucleus 
E) control passage of substances through nuclear envelope

Question 15

Briefly describe how proteins move through the Golgi complex.

Accepted Answer

Proteins are packaged into transport ves

Question 16

What is the site of synthesis of rRNA and assembly of rRNA and proteins into ribosomal subunits?

Accepted Answer

A) nucleus 
B) nucleolus 
C) smooth endoplasmic reticulum 
D) rough endoplasmic reticulum 
E) Golgi complex 
A) nucleus 
B) nucleolus 
C) smooth endoplasmic reticulum 
D) rough endoplasmic reticulum 
E) Golgi complex

Question 17

Which organelle is responsible for synthesis of steroids,phospholipids and functions as a reservoir for Ca2+ in muscle cells?

Accepted Answer

A) mitochondrion 
B) secretory vesicle 
C) smooth endoplasmic reticulum 
D) rough endoplasmic reticulum 
E) lysosome 
A) mitochondrion 
B) secretory vesicle 
C) smooth endoplasmic reticulum 
D) rough endoplasmic reticulum 
E) lysosome

Question 18

Which of the following represents an ion channel?

Accepted Answer

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

Question 19

Which of the following is the correct sequence of events in receptor-mediated endocytosis shown in the figure?

Accepted Answer

A) binding > degradation in lysosomes > vesicle formation > uncoating > recycling of receptors to plasma membrane > fusion with endosome 
B) degradation in lysosomes > fusion with endosome > recycling of receptors to plasma membrane > uncoating > vesicle formation > binding 
C) degradation in lysosomes > recycling of receptors to plasma membrane > fusion with endosome > uncoating > vesicle formation > binding 
D) binding > vesicle formation > uncoating > fusion with endosome > recycling of receptors to plasma membrane > degradation in lysosomes 
E) binding > uncoating > vesicle formation > fusion with endosome > degradation in lysosomes > recycling of receptors to plasma membrane 
A) binding > degradation in lysosomes > vesicle formation > uncoating > recycling of receptors to plasma membrane > fusion with endosome 
B) degradation in lysosomes > fusion with endosome > recycling of receptors to plasma membrane > uncoating > vesicle formation > binding 
C) degradation in lysosomes > recycling of receptors to plasma membrane > fusion with endosome > uncoating > vesicle formation > binding 
D) binding > vesicle formation > uncoating > fusion with endosome > recycling of receptors to plasma membrane > degradation in lysosomes 
E) binding > uncoating > vesicle formation > fusion with endosome > degradation in lysosomes > recycling of receptors to plasma membrane

Question 20

List the steps involved in receptor-mediated endocytosis.

Accepted Answer

The steps involved in receptor-mediated

Exam 3: The Cellular Level of Organization

During this phase of cell division,organelles duplicate and centrosome replication begins.

Briefly describe the driving force for the movement of water across plasma membranes.

Which portion of a DNA segment does not code for a protein?

Which of the following types of membrane proteins function by recognizing and binding to hormones and neurotransmitters?

In the diagram,which organelle aids movement of the cell?

If the solute concentration is greater inside of the cell than outside the cell,water will move by osmosis

Which of the following protects the contents of the nucleus?

Which of the following transport processes uses vesicles that fuse with the plasma membrane to secrete materials into the extracellular fluid?

Which of the following membrane-enclosed organelles can engulf a worn-out organelle,digest its chemical components,and recycle those digested components?

The three main components of the lipid bilayer portion of a plasma membrane are

Which of the cells in the diagram contains structural adaptations that increase surface area for absorption? 1 B 2 C 3 D 4 E

If there are 23 pairs of chromosomes in a human cell,[dropdown 1] chromosomes will be present in each cell during prophase I of meiosis.[dropdown 2] chromosomes will be present in each cell during prophase II. Dropdown Choices: 23 46 92

What is the major function of histones?

Briefly describe how proteins move through the Golgi complex.

What is the site of synthesis of rRNA and assembly of rRNA and proteins into ribosomal subunits?

Which organelle is responsible for synthesis of steroids,phospholipids and functions as a reservoir for Ca2+ in muscle cells?

Which of the following represents an ion channel?

Which of the following is the correct sequence of events in receptor-mediated endocytosis shown in the figure?

List the steps involved in receptor-mediated endocytosis.

An Introduction to the Human Body

The Chemical Level of Organization

The Tissue Level of Organization

The Integumentary System

The Skeletal System: Bone Tissue

The Skeletal System: the Axial Skeleton

The Skeletal System: The Appendicular Skeleton

Joints

Muscular Tissue

The Muscular System

Nervous Tissue

The Spinal Cord and Spinal Nerves

The Brain and Cranial Nerves

The Autonomic Nervous System

Sensory, Motor, and Integrative Systems

The Special Senses

The Endocrine System

The Cardiovascular System: the Blood

The Cardiovascular System: the Heart

The Cardiovascular System: Blood Vessels and Hemodynamics

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Nutrition

The Urinary System

Fluid, Electrolyte, and Acidbase Homeostasis

The Reproductive Systems

Development and Inheritance

Filters

Which organelle is responsible for synthesis of steroids,phospholipids and functions as a reservoir for Ca²⁺in muscle cells?