Download K - FJchimie11

K/U T/I C MC
30
8
27 10
Name: _____________________________
Date:______________________________
Cellular Biology Unit Test
SBI 3C1
PART A: Multiple Choice Questions (15 marks- K/U)
Complete the following questions on the scantron card provided.
Please note: bolded questions are the answers.
1. One of the generalizations of the cell theory is that:
(a) All cells have a nucleus
(b) All cells divide by meiosis
(c) All living things are composed of one or more cells
(d) Growth is solely the result of cell division
2. If a cell did not have ribosomes, it would be unable to?
(a) Extract energy from glucose
(b) Make glucose
(c) Store food in the form of fat
(d) Form proteins
3. Which of the following are found in BOTH plant and animal cells:
(a) Nucleus, Golgi bodies, chloroplasts
(b) Ribosomes, mitochondria, cell membrane
(c) Flagella, cell walls, nucleolous
(d) Vaculoles, nucleolous, lysossomes
4. Which of the following is not a form of passive transport:
(a) Osmosis
(b) Facilitated diffusion
(c) Diffusion
(d) Exocytosis
5. Movement of a molecule against a concentration gradient is:
(a) Simple diffusion
(b) Facilitated diffusion
(c) Osmosis
(d) Active transport
6. The carrier molecules used in active transport are:
(a) Proteins
(b) ATP molecules
(c) Carbohydrates
(d) Lipids
7. When molecules are broken apart in respiration:
(a) The heat produced is used to drive biological reactions
(b) The oxygen in the compounds that are broken apart is used as an energy source
(c) ATP is converted into ADP
(d) ADP is released as a waste product
8. Cells absorb large molecules from a region of low concentration to one of high concentration
by:
(a) Osmosis and diffusion
(b) Endocytosis and diffusion
(c) Active transport
(d) Endocytosis
9. Protein is made up of a long chain of:
(a) glucose molecules
(b) amino acids
10. Polysaccharides are examples of:
(a) starch
(b)glycogen
(c) cellulose
(c) glycerols
(d) provacs
(d) all the above
11. Carbohydrates are:
(a) The primary energy source
(b) Not the primary energy source
(c) Not simple sugars
(d) Found in animal cell walls
12. Plastids…
(a) Are found in specialized animl cells
(b) Produce and store sugars, starch and some pigments
(c) Do not produce and store sugars, starch and some pigments
(d) Maintain turgor pressure
13. Coarse adjustment…
(a) Is used at high magnification only
(b) Moves the stage up and down
(c) Is used at low magnification only
(d) Does nothing
14. Mitochondria can also be thought as:
(a) power house
(b) Mr. mighty might (c) producer of protein
15. The cytoskeleton…
(a) Maintains cell shape and allows for movement of cell parts
(b) Does not maintain cell shape and allows for movement of cell parts
(c) Is not a network of interconnecting fibres
(d) Does not provide protection for the organism
(d) producer of sugar
PART B: Matching Questions (15 marks- K)
Continue to fill out your scantron card…Terms may be used more than once.
a) isotonic
b) exocytosis
c) semi-permeable
d) osmosis
e) starch
16. Iodine solution
ab) endocytosis
ac) hypotonic solution
ad) lysis
ae) cell wall
bc) glucose
bd) mitochondria
be) lipid
cd) Golgi bodies
ce) hypertonic solution
de) hydrophilic
[E]
17. Same concentration of solutes and water [A]
18. Diffusion of water across a semi-permeable membrane [D]
19. Bursting of cells caused by internal pressure [AD]
20. Passage of large molecules into the cell [AB]
21. Passage of large molecules out of the cell [B]
22. Translucent paper test [BE]
23. Membrane allowing certain substances to pass through [C]
24. A solution with a greater concentration of solute outside the cell [AC]
25. Protein packaging factory in the cell [CD]
26. Benedict’s solution [BC]
27. Non-living structure that protects and supports the cell [AE]
28. Kidney shaped organelles, the centre of respiration [BD]
29. Water-loving [DE]
30. A solution with a greater concentration of solvent out of the cell [CE]
PART C: Label the following diagram to the best of your knowledge (5 marks- C)
1. FLAGELLUM
2. MITOCHONDRIA
3. CYTOPLASM
4. CELL MEMBRANE
5. ROUGH ENDOPLASMIC RETICULUM
PART D: Short Answer ( 22 marks- MC)
Answer the following questions to the best of your abilities.
1. Explain the difference between passive and active transport. Give an example of each (4 marks)
Active Transport- energy is used to pass molecules through a membrane
- Facilitated diffusion
Passive Transport – no energy is used to pass molecules through a membrane
- Diffusion
2.Draw a cross section of a cell membrane and label it. (4 marks)
***ANY 4 OF THESE WILL BE ACCEPTED***
3. Describe what would happen if you put an animal cell in a hypotonic and a hypertonic solution.
Use a diagram to aid in explanation. (Assume the membrane is selectively permeable to water) (6
marks)
Hypotonic Solution- cell is hypertonic and solutes will flow into the cell causing it to fill.
When the amount of solutes outside and relatively equal to solutes inside the cell dynamic
equilibrium is reached. If too many solutes enter, a plant cell will become turgid and an
animal cell will preform cell lysis.
Hypertonic Solution- cell is in hypotonic and solutes will flow out of the cell causing it to
empty. When the amount of solutes outside and relatively equal to solutes inside the cell
dynamic equilibrium is reached.
4. Given DNA strand 1, provide the complimentary DNA strand 2. (2 marks)
DNA strand 1:
A T G A T C G A T C T C A G C T A G
DNA strand 2:T A C T A G C T A G A G T C G A T C
5. Write the balanced chemical equation for cellular respiration. (2 marks)
6. Explain the enzyme-subtrate model. Use diagrams and point form notes to explain. (4 marks)
PART D: Making Connections ( 10 marks)
Answer the following questions to the best of your abilities.
1. Why is it not a good idea to consume a diet rich in saturated fats and cholesterol? (2
marks)
-
the fats stack ontop of each other creating plaque on the inside of your
veins and arteries
can lead to heart disease
2. Describe two industrial uses of enzymes, one in the food making sector, the other in the
cleaning sector. (2 marks)
- lactase- helps digest milk in your body
- cellulase- helps soften clothes
3. Why does salted popcorn dry your lips? (2 marks)
- salt from popcorn puts lips in a hypotonic solution with salt.
- draws salt into cell and water out causing the drying of the lips
4. List and explain 4 differences between plant and animal cells (4 marks)
Animal Cell
Plant Cell
Cilia:
Present
It is very rare
Shape:
Round (irregular shape)
Rectangular (fixed shape)
Chloroplast:
Cytoplasm:
Animal cells don't have
chloroplasts
Plant cells have chloroplasts
because they make their own
food
Present
Present
Present
Present
Ribosomes:
Present
Present
Mitochondria:
Present
Present
One or more small vacuoles
One, large central vacuole
Endoplasmic Reticulum
(Smooth and Rough):
Vacuole:
(much smaller than plant cells). taking up 90% of cell volume.
Only present in lower plant
Centrioles:
Present in all animal cells
Plastids:
Absent
Present
Golgi Apparatus:
Present
Present
Cell wall:
Absent
Present
Plasma Membrane:
only cell membrane
cell wall and a cell membrane
Present
Present
May be found in some cells
May be found in some cells
Microtubules/
Microfilaments:
Flagella:
Lysosomes:
Nucleus:
forms.
Lysosomes occur in cytoplasm. Lysosomes usually not evident.
Present
Present
PART E: Long Answer (8 marks)
5. In a well thought out paragraph, compare and contrast diffusion and osmosis. Make sure to
provide some examples. You will be marked on how well you use proper terminology, spelling
and grammar.
Main points students should have written in their answers.
Osmosis
-molecules go through a
semipermeable membrane
-just water
Similarities
-molecules move around to
create equilibrium
- passive movement
- molecules move from high
concentration to low
concentration
Diffusion
-molecules spread out over a
large area
-everything but water
SAMPLE PARAGRAPH:
Diffusion and osmosis share many similarities. In both diffusion and osmosis, molecules move
around to create equilibrium. It is a passive movement of molecules from high concentration to
low concentration. However, there are some key differences between the two. Osmosis involves
only water. Osmosis is the movement of water molecules through a semi-permeable membrane
from an area of high concentration to low concentration. For example, if there is a very high salt
concentration in the fluid outside of the cell, then water from inside the cell will move outside of
the cell because the water concentration is high inside the cell (less salt) and lower outside of the
cell (more salt). Thus, water is moving from an area of high concentration to low concentration.
Diffusion involves any molecule with the exception of water that moves from an area of high
concentration to an area of low concentration. For example, if you place one drop of food
colouring in a beaker full of water, initially the drop of food colouring will only be concentrated in
the spot where you dropped it into the water. However after some time, the molecules of the food
colouring will spread out throughout the entire beaker and eventually the entire beaker of water
will be the same colour.