Micro Chapter 5

Question 1

Membrane-delimited nuclei and organelles are characteristics of
	A)	Eukarya only
	B)	Bacteria only
	C)	Bacteria and Archaea only
	D)	Bacteria, Archaea, and Eukarya

Answer 1

A

Question 2

Intracellular structures that perform specific functions in cells are called
	A)	Enzymes
	B)	Membranes
	C)	Organelles
	D)	Proteins

Answer 2

C

Question 3

Membranes are advantageous to eukaryotic cells because they
A) Transport materials between cellular locations
B) Allow resistance to osmotic pressure
C) Compartmentalize metabolic activity in the cell
D) All of the above

Answer 3

D

Question 4

Eukaryotic plasma membranes are composed of
	A)	Hopanoids
	B)	Sphingolipids and sterols
	C)	C20 and C40 tetraethers
	D)	None of the above

Answer 4

B

Question 5

Eukaryotic plasma membranes are resistant to osmotic pressure and mechanical stress because
A) They often form pentacyclic rings
B) They are covered by an external cell wall
C) Their membrane lipids are packed closely together
D) None of the above

Answer 5

C

Question 6

Place these cytoskeleton components in order by size from smallest to largest.
A) Microfilaments, intermediate filaments, microtubules
B) Microtubules, intermediate filaments, microfilaments
C) Intermediate filaments, microfilaments, microtubules
D) Intermediate filaments, microtubules, microfilaments

Answer 6

A

Question 7

Which cytoskeleton component forms the spindle apparatus that separates chromosomes during mitosis and meiosis?
	A)	Microfilaments
	B)	Intermediate filaments
	C)	Microtubules
	D)	All of the above

Answer 7

C

Question 8

Which cellular organelle is responsible for transporting proteins and lipids throughout the cell?
	A)	Cytoskeleton
	B)	Endoplasmic reticulum (ER)
	C)	Lysosomes
	D)	Golgi apparatus

Answer 8

B

Question 9

Which cellular organelle packages materials and prepares them for secretion?
	A)	Cytoplasm
	B)	Golgi apparatus
	C)	Endoplasmic reticulum
	D)	Lysosomes

Answer 9

B

Question 10

Which cellular pathway moves materials to various sites within the cell?
	A)	Secretory pathway
	B)	Endocytic pathway
	C)	Metabolic pathway
	D)	Exocytic pathway

Answer 10

A

Question 11

What happens to proteins that do not fold properly inside an eukaryotic cell?
A) They are removed from the cell via exocytosis
B) They are refolded into the proper structure
C) They are targeted for degradation by proteasomes
D) None of the above

Answer 11

C

Question 12

The endocytic pathway can be used
	A)	As a feeding mechanism
	B)	To concentrate materials outside the cell before bringing them in
	C)	To bring viruses into host cells
	D)	All of the above

Answer 12

D

Question 13

Which endocytic pathway can be used to internalize hormones, growth factors, iron, and cholesterol?
	A)	Phagocytosis
	B)	Clathrin-dependent endocytosis
	C)	Caveolae-dependent endocytosis
	D)	All of the above

Answer 13

B

Question 14

The process by which cells selectively digest and recycle cytoplasmic components is called
	A)	Pinocytosis
	B)	Macroautophagy
	C)	Phagocytosis
	D)	Clathrin-dependent endocytosis

Answer 14

B

Question 15

The function of the nucleus is
	A)	To synthesize proteins
	B)	To transport proteins and lipids
	C)	As the repository for the cells genetic information
	D)	All of the above

Answer 15

C

Question 16

Which organelle is responsible for rRNA synthesis and the assembly of ribosomal subunits?
	A)	Nucleus
	B)	Chromatin
	C)	Histones
	D)	Nucleolus

Answer 16

D

Question 17

Which cellular organelle is responsible for synthesizing proteins?
	A)	Nucleus
	B)	Ribosome
	C)	Chromatin
	D)	Histones

Answer 17

B

Question 18

The following metabolic processes are associated with cellular mitochondria
	A)	The tricarboxylic acid cycle
	B)	Cellular respiration
	C)	ATP generation
	D)	All of the above

Answer 18

D

Question 19

Examples of cellular organelles with their own chromosomes and ribosomes include
	A)	Mitochondria and chloroplasts
	B)	Endoplasmic reticulum and lysosomes
	C)	Ribosomal subunits
	D)	Cytoplasm and cytoskeleton

Answer 19

A

Question 20

How do hydrogenosomes differ from mitochondria?
	A)	They lack cristae
	B)	They lack DNA
	C)	They generate ATP anaerobically
	D)	All of the above

Answer 20

D

Question 21

Which organelle is responsible for photosynthesis in protists and plants?
	A)	Mitochondria
	B)	Chloroplasts
	C)	Hydrogenosomes
	D)	All of the above

Answer 21

B

Question 22

Where does the light reaction of photosynthesis occur in the chloroplast?
A) The thylakoid membranes only
B) The stroma only
C) Both the thylakoid membrane and the stroma
D) Neither the thylakoid membrane nor the stroma

Answer 22

A

Question 23

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ are external structures that move in a two-stroke manner (effective stroke and recovery stroke).
	A)	The plasma membrane proteins
	B)	The flagella
	C)	The cilia
	D)	The microtubules

Answer 23

C

Question 24

Eukaryotic cells differ from bacterial and archaeal cells in that
A) They have a membrane-bound nucleus
B) They undergo mitosis and meiosis
C) They have complex membrane-bound organelles
D) All of the above

Answer 24

D

Question 25

Protist classification is difficult because
A) Protists exhibit extensive diversity
B) Protists diverged from multiple evolutionary origins
C) Protists exhibit diverse types of metabolism
D) All of the above

Answer 25

D

Question 26

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ is a support mechanism found in protists.
	A)	The contractile vacuole
	B)	The pellicle
	C)	The cytosome
	D)	The pyrenoid

Answer 26

B

Question 27

Yeast is a unicellular organism classified as
	A)	A fungus
	B)	A protist
	C)	An Archaean
	D)	A bacteria

Answer 27

A