Chapter 3 Pt. 4

Question 1

What are the organelles where most of the cellular respiration occurs?

Answer 1

mitochondria

Question 2

Mitochondria provides ________ that cells need

Answer 2

energy

Question 3

The number of ____________ is roughly correlated with a cell’s demand for _______

Answer 3

mitochondria

energy

Question 4

What is cristae?

Answer 4

the inholdings of the inner membrane of a mitochondrion

Question 5

__________ contain _________ and a small percentage of a cell’s total DNA

Answer 5

Mitochondria

ribosomes

Question 6

Mitochondria contain ribosomes and a small percentage of a cell’s total _____

Answer 6

DNA

Question 7

Mitochondria contain ribosomes and a small percentage of a cell’s total DNA.
Why is this?

Answer 7

they are likely descendants of once free-living bacteria that invaded or were engulfed by ancient cells

Question 8

What is the cytoskeleton?

Answer 8

a complex network of fibers

Question 9

How is the cytoskeleton divided up?

Answer 9

(1) Microtubules
(2) Microfilaments
(3) Intermediate Filaments

Question 10

Which main component of the cytoskeleton is this:

straight, hollow rods made of the protein

Answer 10

Microtubules

Question 11

Which main component of the cytoskeleton is this:

solid rods made of the protein actin

Answer 11

Microfilaments

Question 12

Which main component of the cytoskeleton is this:

a diverse group of ropelike fibers that maintain cell shape and anchor certain organelles in place

Answer 12

Intermediate Filaments

Question 13

What is the thickest fiber in the cytoskeleton?

Answer 13

Microtubules

Question 14

Some __________ maintain cell shape

Answer 14

microtubules

Question 15

Some microtubules maintain ____ ______

Answer 15

cell shape

Question 16

What part of the cytoskeleton forms tracks along which organelles or vesicles travel?

Answer 16

Microtubules

Question 17

Microtubules play a role in the separation of ___________ during cell division

Answer 17

chromosomes

Question 18

Microtubules contain _________

Answer 18

centrioles

Question 19

What are centrioles?

Answer 19

a microtubule organizing center located near the nucleus

Question 20

Each centriole is composed of __ sets of __ microtubules arranged in a ____

Answer 20

9
3
ring

Question 21

Centrioles function in cell division and in the formation of ____ and ______

Answer 21

cilia

flagella

Question 22

Is this cilia or flagella:

numerous short extensions on a cell that move with the back-and-forth motion of cars

Answer 22

cilia

Question 23

Is this cilia or flagella:

singular, cilium

Answer 23

cilia

Question 24

Is this cilia or flagella:

smoking, destroys these cilia and hampers cleaning or respiratory surfaces

Answer 24

cilia

Question 25

Is this cilia or flagella:

resembles a whip and moves in an undulating manner

Answer 25

flagellum

Question 26

Flagellum are much _______ than cilia

Answer 26

longer

Question 27

the only cell with a flagellum in humans is the _______ _____

Answer 27

sperm cell

Question 28

How do cilia and flagellum differ?

Answer 28

differ in length, number per cell, and pattern of movement

Question 29

___________ are responsible for muscle contraction

Answer 29

Microfilaments

Question 30

Microfilaments are responsible for _______ _________

Answer 30

muscle contraction

Question 31

Who do microfilaments do during cell division?

Answer 31

form a bond that contracts and pinches the cell in two

Question 32

________ __________ in intermediate filaments varies depending on the cell

Answer 32

Protein composition