Cells, Exchange and Transport Quiz

OCR Unit 1, Modules 1 and 2

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  • Created by: Hannah
  • Created on: 02-01-12 16:55
State one function of the Golgi apparatus
To modify and package proteins
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Why does the nuclear envelope contain pores?
To allow relatively large molecules into and out of the nucleus, such as RNA and Ribosomes
2 of 13
What is the function of the lysosomes?
To break down damaged or old cell components
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What is an organ?
A collection of similar tissues working together to perform a specific function
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List three components of a cell surface/plasma membrane
Glycoproteins, Glycolipids, Cholesterol
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Explain what is meant by the term active transport
Molecules are moved against their concentration gradient, through carrier proteins which change shape, requires ATP
6 of 13
State an example of active transport in cells and the substance involved
Magnesium ions into the root hair cell in plants
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Why is the wall of the left ventricle thicker than that of the left atrium?
The left ventricle needs to pump blood all the way round the body, at a great distance from the heart, it must overcome the systemic pressure so it must be able to contract more strongly to create more pressure
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How do pressure changes in the heart bring about the closure of the bicuspid valve?
When the ventricles contract, pressure in the ventricles increases above the pressure in the atria, so blood fills the bicuspid valve and it snaps shut
9 of 13
Name two parts of a plant where meristematic tissue can be found
Root tips and Shoot tips
10 of 13
Name the type of nuclear division that occurs in a plant meristem
Mitosis
11 of 13
Name the sugar molecule most commonly translocated
Sucrose
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State two adaptations of sieve tubes that enable mass flow to occur
No nucleus, very little cytoplasm
13 of 13

Other cards in this set

Card 2

Front

Why does the nuclear envelope contain pores?

Back

To allow relatively large molecules into and out of the nucleus, such as RNA and Ribosomes

Card 3

Front

What is the function of the lysosomes?

Back

Preview of the front of card 3

Card 4

Front

What is an organ?

Back

Preview of the front of card 4

Card 5

Front

List three components of a cell surface/plasma membrane

Back

Preview of the front of card 5
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Comments

Former Member

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Awesome quiz! Thanks for uploading :)

Hannah

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No problem :) good luck for the exam

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