AnswersPMHS Biology I Q2Cell Differentiation and Specialization

Cell Differentiation and Specialization — Cumulative exam Answers

0 verified answers2 views
21
Free Preview

Mitosis is important because it allows

A
new cells to replace old damaged cells.
B
new cells to repair old damaged cells.
C
old cells to self-repair when they become damaged.
D
existing cells to take over the function of damaged cells.
22
Free Preview

Which substance is a compound?

A
salt
B
phosphorus
C
sulfur
D
oxygen
23

For which form of reproduction is a mate required?

A
asexual reproduction
B
sexual reproduction
C
mitosis
D
binary fission
24

Which characteristic of life best describes the life cycle of a frog?

A
having cells
B
using energy
C
responding to the environment
D
growing and developing
25

Which is required for sexual reproduction?

A
mitosis
B
binary fission
C
diploid cell production
D
meiosis
26

During which process is ethanol produced?

A
lactic acid fermentation
B
alcohol fermentation
C
citric acid cycle
D
electron transport chain
27

Unsaturated and saturated lipids exhibit different characteristics based on their structures. Which characteristic is unique to saturated fats?

A
forms covalent, carbon-to-carbon bonds
B
is a liquid at room temperature
C
contains the maximum number of hydrogen atoms
D
consists of fatty acids and a carboxyl group
28

Which is an example of a lipid?

A
cholesterol
B
glycerol
C
glycogen
D
proteins
29

A biologist is studying a structure that is made up of two layers of phospholipids. What is she most likely studying?

A
DNA molecules
B
cell membranes
C
fats
D
wax
30

Which term describes a pure substance that is made up of only one type of atom?

A
matter
B
rock
C
compound
D
element
31

People with diabetes often receive insulin injections. What effect does insulin have on the body?

A
It raises blood-sugar levels.
B
It lowers blood-sugar levels.
C
It raises glucagon levels.
D
It lowers glucagon levels.
32

Which is a disaccharide?

A
glucose
B
fructose
C
sucrose
D
cellulose
33

Which movement of particles would be most affected by a disorder that causes damage to carrier proteins?

A
osmosis
B
passive transport
C
active transport
D
diffusion
34

Which organelles are found in plant cells but not in animal cells?

A
cell membrane, vacuole
B
cell wall, chloroplasts
C
cell wall, vacuole
D
cell membrane, chloroplasts
35

The graphic shows the citric acid cycle. During the citric acid cycle, what happens to acetyl-CoA?

Question illustration
A
It enters the citric acid cycle and gains carbon dioxide to form citric acid, and gains more carbon dioxide through redox reactions to form a 4-carbon molecule.
B
It enters the citric acid cycle and associates with a 4-carbon molecule, forming citric acid, and then through redox reactions regenerates the 4-carbon molecule.
C
It enters glycolysis and associates with a 5-carbon molecule through redox reactions, forming another acetyl-CoA molecule.
D
It enters the citric acid cycle and associates with a 4-carbon molecule, forming a 5-carbon compound, and then through oxidation reactions regenerates the 4-carbon molecule.
36

Which type of cell is capable of self-renewal?

A
stem cell
B
blood cell
C
muscle cell
D
neuron
37

Lactase and carbonic anhydrase are examples of what type of substance?

A
substrate
B
reactant
C
product
D
enzyme
38

Which discovery did Gregor Mendel make?

A
Traits are inherited independently of each other.
B
Traits are inherited as a tetrad.
C
Traits are inherited as homologous pairs.
D
Traits are inherited as a set, from one parent.
39

Which is a synonym for male and female sex cells?

A
gametes
B
chromosomes
C
eukaryotes
D
diploids
40

Which of the steps in this sequence of events is an example of mitosis at work?

A
A baseball hits the arm of a baseball player.
B
The player reacts quickly grabbing his arm.
C
A bruise forms where the ball hit the arm.
D
The bruise slowly disappears as the arm heals.

Did you find these answers helpful?