Charlotte Jakes
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Quiz based on Cells & Organelles lecture.

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Charlotte Jakes
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Cells & Organelles

Question 1 of 17

1

What are the main ideas of the cell theory? Select 2.

Select one or more of the following:

  • That everything in the universe consists of cells

  • That all cells come from pre-existing cells

  • That cells form the basic structural unit of living organisms

  • That cells can be specialised to perform particular functions

Explanation

Question 2 of 17

1

What are the advantages of using light microscopes? Select all that apply.

Select one or more of the following:

  • High resolution

  • Inexpensive

  • Complex preparation

  • Can view living samples

Explanation

Question 3 of 17

1

What are the disadvantages of using electron microscopes?

Select one or more of the following:

  • Expensive

  • Low resolution

  • No living specimens

  • Complex preparation

Explanation

Question 4 of 17

1

Fill the blank spaces to complete the text.

Diffusion is efficient at < um. As cells increase in size, increases more than . The distance from the to the influences the rate of movement of intermediates, waste products etc. Thus, cells must be to ensure this movement is efficient.

Explanation

Question 5 of 17

1

Which component of the cell removes diffusion as the transport mechanism to overcome size limitation?

Select one of the following:

  • Cytoskeleton

  • Giant multinucleate cells

  • Gap junctions

Explanation

Question 6 of 17

1

Check all the features of a eukaryotic cell

Select one or more of the following:

  • Double stranded DNA condensed into multiple chromosomes

  • Single-stranded chromosome

  • Plasmids

  • Membrane-bound organelles

  • Peptidoglycan cell wall

  • Carbohydrate capsule

  • Pilli (protein extensions that facilitate cell adhesion)

  • 80S ribosomes

  • 70S ribosomes

  • Flagella

Explanation

Question 7 of 17

1

Viruses can only replicate using the protein synthesis mechanisms of host cells

Select one of the following:

  • True
  • False

Explanation

Question 8 of 17

1

Fill the blank spaces to complete the text.

The nucleus is surrounded by a double membrane called the which surrounds the internal environment. allow entry and exit of materials such as mRNA. The nucleus retains genetic information in the form of .

Explanation

Question 9 of 17

1

Check the processes that occur in the smooth endoplasmic reticulum

Select one or more of the following:

  • Synthesis of membrane lipids and steroids

  • Initiation of N-linked glycosylation

  • Detoxification of xenobiotics

  • Protein synthesis

  • Folding of proteins using cys-cys bridges

Explanation

Question 10 of 17

1

A xenobiotic is a chemical product in an organism that would be expected to be present there

Select one of the following:

  • True
  • False

Explanation

Question 11 of 17

1

What is the name of the folds formed by the inner membrane of the mitochondria?

Select one of the following:

  • Cristae

  • Cisternae

  • Christina

  • Mitochondrial folds

Explanation

Question 12 of 17

1

Fill the blank spaces to complete the text.

A peroxisome is a sac found in the containing which carry out of VLCFA and amino acids to . It has electron density.

Explanation

Question 13 of 17

1

Fill the blank spaces to complete the text.

When peroxisomes VLCFA and amino acids to , the hydrogen peroxide must be removed because it is . Thus, peroxisomes also contain enzymes. These enzymes convert hydrogen peroxide to and water. This ensures safe .

Explanation

Question 14 of 17

1

What is a plasmalogen?

Select one of the following:

  • Primary ether phospholipid which forms cell membranes

  • A protein found freely in the blood plasma

  • A toxin secreted by cholera bacteria

  • A type of attachment protein found embedded in the lipid envelope of HIV

Explanation

Question 15 of 17

1

What is glycosylation?

Select one of the following:

  • The oxidation of glucose to pyruvate in respiration

  • The attachment of a carbohydrate to another molecule's functional group, usually via an -OH or -NH2

  • The oxidation of acetyl CoA to reduce cofactors NAD and FAD

  • The phosphorylation of glucose

Explanation

Question 16 of 17

1

Zellweger syndrome is characterised by a lack of what?

Select one of the following:

  • Peroxisomes

  • Lysosomes

  • Rough ER

  • Smooth ER

  • Golgi apparatus

Explanation

Question 17 of 17

1

Infants with Zellweger syndrome usually do not live past 1 year and have facial deformity, intellectual disability as well as impaired vision and hearing. What causses this?

Select one of the following:

  • Accumulation of copper, iron and VLCFA in blood and tissues

  • Inability to modify proteins

  • Inability to hydrolyse old cellular material

  • Inability to form vesicles for exocytosis

Explanation

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