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Grade 9 Science Exam Review- 2
Section B&C from your exam outline
1. The Cell Theory states:
a) All living things are composed of one or more cells.
b) Cells are the basic units of structure and function in all organisms.
c) All cells come from previously existing cells.
d) All of the above.
2. An organelle is:
a) A process that ensures that each new cell has a nucleus.
b) A phase that the cell spends most of its time in.
c) Specialized structures that perform specialized functions in a cell.
d) None of the above.
3. The nucleus of a cell:
a) Co-ordinates, controls, and manages cell functions.
b) Encloses the cell contents.
c) Breaks down food and digests wastes within the cell.
d) Is not necessary for cell function.
4. The casing around the nucleus of the cell is called:
a) Golgi bodies
b) Ribosomes
c) Nucleolus
d) Nuclear membrane
5. Multicellular plants rely on the strength of this to provide support for the
entire organism.
a) Cytoplasm
b) Cell wall
c) Chromosomes
d) Nucleolus
6. This is the “jelly-like” material in the cell.
a) Cytoplasm
b) Nucleus
c) Mitosis
d) None of the above.
7. Chloroplasts enable a plant to:
a) Copy its DNA
b) Sleep
c) Produce its own food through photosynthesis.
d) All of the above
8. The process that a cell goes through to replicate its DNA and create a
daughter cell is called:
a) Meiosis
b) Mitosis
c) None of the above
9. In Investigation 1-B “Who’s the Instructor?” What cell part of the cell
turned out to be “the Instructor?”
a) The cell membrane
b) The cytoplasm
c) The cell wall
d) The nucleus
10. How many stages of Mitosis are there?
a) 7
b) 4
c) 3
d) 10
11. In prophase, the nuclear membrane disappears and _______________
start to grow from each end of the cell.
a) Spindle fibres
b) DNA
c) Chromosomes
d) None of the above
12. When the cell is at the end of its last phase in mitosis, it will then go
through:
a) Cell division
b) Anaphase
c) Metaphase
d) DNA Replication
13. The cell cycle:
a) Helps us grow
b) Helps cuts heal
c) Helps us think
d) All of the above
14. DNA is found on:
a) The cell wall
b) The chloroplasts
c) The chromosomes
d) The cell membrane
15. The new cell that is created during mitosis and cell division:
a) Is not the same as its parent cell
b) Is only 50% the same its parent cell
c) Is identical to its parent cell
d) None of the above
Answer the following True or False.
1. During the 1700s, most of society thought that
Microscopes were instruments of evil.
______________
2. Spontaneous generation was a theory stating that
Living organisms do not arise from non-living matter ______________
3. A cell spends the greatest amount of time in interphase ______________
4. There are 3 divisions in the process of mitosis
______________
5. The continuous processes of mitosis, cell division, and ______________
interphase are called the cell cycle.
6. Red blood cells have a lifespan of 2 days.
______________
7. Invertebrates make up about 97% of all animal species. ______________
8. Technological developments have made the detailed
study of living things possible.
______________
9. Chromatin encloses the contents of the cell.
______________
10. Chloroplasts are found in animal cells.
______________
11. Mitosis and cell division are necessary to replace dead ______________
cells.
12. The nucleus is “the control center” of the cell
______________
13. All humans have the same number of chromosomes
in each nucleus of their body cells..
______________
14. The cell cycle ensures that the number of
Chromosomes in the nuclei of your body cells will
Change to suit conditions.
______________
Vocabulary. Write the correct word next its definition.
1. The process that makes sure each new cell has a
nucleus with a complete set of instructions. (DNA)
______________
2. This term refers to various techniques that use living
organisms to make products or services.
_______________
3. Before mitosis can begin, the nucleus makes a copy of. ______________
its chromatin. This is known as…
4. A segment of DNA on a chromosome is a
______________
5. The jelly- like material enclosed by the cell membrane ______________
6. These are specialized structures that perform specific
functions in the cell.
7. These are the basic units of structure and function
in all organisms.
_______________
8. “Dolly the Sheep” was one of these.
_______________
7. The repair of injured cells or the making of lost
Body parts is called...
______________
10. Plant tissue made up of actively dividing cells.
They are usually found in root and stem tips.
______________
11. The organelle in a plant cell that allows them to make _______________
their own food through photosynthesis.
12. After mitosis, the cell membrane pinches,
dividing the cytoplasm into two new cells.
This is called…
13. Many purebred dogs have been a result of this
example of biotechnology.
______________
______________
Questions
1. What is the basic unit of life?
2. What is the result of “cells dividing uncontrollably”?
3. What are two of the three ways Fungi reproduce asexually?
4. Explain the differences between an animal and plant cell.
5. Explain the process of binary fission.
6. What is meristem? Why is it important to plants?
7. What do scientists believe is an explanation for the process of aging?
8. Explain the process of mitosis.
9. Deoxyribonucleic Acid is better known as…
11. State the four major claims of the Cell Theory.
12. Describe the sequence of events in a typical cell cycle.