Cell cycle review questions- KEY
1.
Why is mitosis important?
a. for growth of organisms
b. to heal from injuries
2.
Which cell cycle stage do cells spend most of their time in? interphase
3.
Which disease is characterized by uncontrolled cell division? cancer
4.
What are chromosomes made of? DNA
5.
What happens to the amount of DNA in the nucleus just before the beginning of mitosis?
it is replicated so there are two copies
6.
What is the function (job) of spindle fibers? they help separate the paired chromosomes and
bring them to the ends of the cell (in anaphase).
7.
A parent cell has 8 chromosomes. After mitosis, how many daughter cells will there be,
and how many chromosomes will each have? 2 daughter cells with 4 chromosomes each
Photosynthesis and cellular respiration review questions
8.
What is the purpose of photosynthesis? Which organisms perform it? To create food from
sunlight. Only plants perform photosynthesis
9.
What is the purpose of cellular respiration? Where does it occur? To release energy from
food in a form that cells can use (ATP). It occurs in the mitochondria of both animals and plants.
10.
What are the reactants, or ‘ingredients’ of photosynthesis? carbon dioxide,
water, and sunlight
11.
What are the products of photosynthesis? Oxygen and glucose
12.
How is our breathing connected to cellular respiration? We need to take in oxygen so that our
mitochondria can perform cellular respiration
13.
What happens to your breathing as you exercise? Why? As your body’s need for energy
increases, the mitochondria in your cells require more oxygen, and you start to breathe faster to
take in more oxygen.
14.
Explain how the cycles of photosynthesis and cellular respiration are related: the products
of photosynthesis are the reactants of cellular respiration; the reactions for the processes are
opposite; one is no good without the other (photosynthesis produces food, but without cellular
respiration noone would be able to get the energy out of it; cellular respiration releases energy
from food, but it must have food to release energy from)