Cell membranes and transport


Answer all the questions. Use a text book if you want to.
Please enter your Full Name:
Your Email Address:
Your biology group

1: Look at the cell membrane diagram. Which part is a glycoprotein?
A
B
C
D
E
F


2: Look at the cell membrane diagram. Which part is a hydrophylic head?
A
B
C
D
E
F


3: Which part allows facilitated diffusion to take place?
A
B
C
D
E
F


4: Which part could be a digestive enzyme?
A
B
C
D
E
F


5: Look at the diagram. What process is happening at A?
Facilitated diffusion
Simple diffusion
Bulk transport
Osmosis
Active transport


6: Look at the diagram. What process is happening at C?
Facilitated diffusion
Simple diffusion
Bulk transport
Osmosis
Active transport


7: Which of these terms could describe exocytosis?
Facilitated diffusion
Simple diffusion
Bulk transport
Osmosis
Active transport


8: What word describes these cells?
Endocytosis
Exocytosis
Plasmodium
Plasmolysed
Turgor


9: What is the thickness of the cell membrane?
70nm
7mm
0.7mm
7nm
0.7nm
700nm


10: If the water potential inside the onion cells in this diagram was -400kPa. What could the water potential of the surrounding solution be?
-401kPa
-400kPa
-399kPa
-50kPa
-3500kPa


11: What is the water potential of distilled water?
100kPa
-100kPa
0kPa
2000kPa
-2000kPa


12: What does this photograph show?
Human skin cells
Human hair follicle
Flagellated protozoan
Root hair cells
Lower leaf epidermal cells


13: What is the role of these cells?
Removal of waste products
Uptake of water and ions
Exocytosis of digestive enzymes
Removal of bacterial cells by phagocytosis
Secretion of hormones
Gaseous exchange


14: Which of these is not a property of a good exchange surface?
Large surface area
Good transport system
Permeable membrane
Thin cells
Large concentration gradient
Cold conditions
Small molecules


15: This diagram shows a root hair cell. What is the name of part C?
Cell membrane
Cell wall
Cytoplasm
Vacuole
Nucleus


16: If this cell was placed into distilled water. Which best describes what happens?
The cell plasmolyses
Water leaves the cell until it is flaccid
Water enters the cell by facilitated diffusion
Water enters the cell by osmosis. The pressure potential increases and the cell becomes turgid
Water enters the cell by osmosis. The solute potential increases and the cell becomes turgid


17: Which ion is needed by plants to make proteins?
Bromide
Nitrate
Sulphate
Carbonate
Phosphate
Chloride


18: Which best describes the movement of water through this cell
The outside solution is hypertonic and water flows into the cell by osmosis
The outside solution is isotonic and water flows into the cell by osmosis
The outside solution is hypertonic and water flows out of the cell by osmosis
The outside solution is hypotonic and water flows into the cell by osmosis
There is no net movement of water through the cell


19: Which part is the gas exchange surface in the respiratory system?
A
B
C
D
E
F
G


20: Which part is the bronchus?
A
B
C
D
E
F
G


21: In this electronmicrograph A is a bacterium and B a white blood cell. What does this picture show??
pinocytosis
phagocytosis
exocytosis
plasmolysis
secretory vesicles


22: If this model represents the flow of water into and out of a plant cell. What does the 'force' represent?
pressure potential
solute potential
water potential of the cell
Solvent potential
External osmotic potential
Internal vacuole potential
23: Which of these molecules help stabilize the cell membrane and affect the fluidity?
phospholipid
glycolipid
cholesterol
phospholipid
surface protein
transport protein


24: Which part of the cell membrane enables cell recognition?
cholesterol
carbohydrate groups on glycoprotein
phospholipid
surface protein
transport protein
hydrophobic tails


25: Which of these factors will speed up the uptake of ions by diffusion across a membrane?
lower temperature
Thicker membrane
Smaller surface area
Larger molecule
Larger concentration gradient
Less kinetic energy


26: An increase in the production and metabolism of this molecule indicates that active transport is taking place
water
carbon dioxide
ATP
amino acid
glycerol
chloride ion


27: Under these conditions the cell membrane becomes more fluid
Lower temperature
More cholesterol
More glycoprotein
More unsaturated fatty acids
More saturated fatty acids
More transport proteins


28: What is the term given to a membrane protein that bears a carbohydrate chain

29:

Explain what a receptor molecule is, and where you would find one.

30:

Examine the diagram below. Explain how it is adapted to maximise gaseous exchange


Powered by QuizTest v3.0.28 (Quiz Engine Copyright © 1997-2000 Kristina Pfaff-Harris and can be found at http://www.tesol.net/scripts)

Author: Mr P Sewell