Charlotte Jakes
Quiz por , criado more than 1 year ago

Quiz based on Cells & Organelles lecture.

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Charlotte Jakes
Criado por Charlotte Jakes mais de 4 anos atrás
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Cells & Organelles

Questão 1 de 17

1

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

Selecione uma ou mais das seguintes:

  • 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

Explicação

Questão 2 de 17

1

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

Selecione uma ou mais das seguintes:

  • High resolution

  • Inexpensive

  • Complex preparation

  • Can view living samples

Explicação

Questão 3 de 17

1

What are the disadvantages of using electron microscopes?

Selecione uma ou mais das seguintes:

  • Expensive

  • Low resolution

  • No living specimens

  • Complex preparation

Explicação

Questão 4 de 17

1

Preencha os espaços em branco para completar o texto.

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.

Explicação

Questão 5 de 17

1

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

Selecione uma das seguintes:

  • Cytoskeleton

  • Giant multinucleate cells

  • Gap junctions

Explicação

Questão 6 de 17

1

Check all the features of a eukaryotic cell

Selecione uma ou mais das seguintes:

  • 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

Explicação

Questão 7 de 17

1

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

Selecione uma das opções:

  • VERDADEIRO
  • FALSO

Explicação

Questão 8 de 17

1

Preencha os espaços em branco para completar o texto.

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 .

Explicação

Questão 9 de 17

1

Check the processes that occur in the smooth endoplasmic reticulum

Selecione uma ou mais das seguintes:

  • Synthesis of membrane lipids and steroids

  • Initiation of N-linked glycosylation

  • Detoxification of xenobiotics

  • Protein synthesis

  • Folding of proteins using cys-cys bridges

Explicação

Questão 10 de 17

1

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

Selecione uma das opções:

  • VERDADEIRO
  • FALSO

Explicação

Questão 11 de 17

1

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

Selecione uma das seguintes:

  • Cristae

  • Cisternae

  • Christina

  • Mitochondrial folds

Explicação

Questão 12 de 17

1

Preencha os espaços em branco para completar o texto.

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

Explicação

Questão 13 de 17

1

Preencha os espaços em branco para completar o texto.

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 .

Explicação

Questão 14 de 17

1

What is a plasmalogen?

Selecione uma das seguintes:

  • 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

Explicação

Questão 15 de 17

1

What is glycosylation?

Selecione uma das seguintes:

  • 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

Explicação

Questão 16 de 17

1

Zellweger syndrome is characterised by a lack of what?

Selecione uma das seguintes:

  • Peroxisomes

  • Lysosomes

  • Rough ER

  • Smooth ER

  • Golgi apparatus

Explicação

Questão 17 de 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?

Selecione uma das seguintes:

  • 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

Explicação