Cell Biology Flashcards

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1
Q

What enzyme is used to cut open DNA?

A

Endonuclease (scissors)

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2
Q

What enzyme is used to ‘glue’ DNS back together?

A

Ligase

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3
Q

What can effect the rate of active transport?

A

Glucose concentration
Oxygen concentration
Temperature

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4
Q

What is respiration?

A

Chemical energy released in food by a series enzyme controlled reactions

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5
Q

Name uses of energy in cells

A

Muscle contraction
Cell division
Chemical reactions
Makes heat

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6
Q

Optimum levels for human enzymes?

A

37’C

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7
Q

Why is respiration irreversible in plants?

A

Carbon dioxide escapes and it drowns in the ethanol

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8
Q

Where is DNA found within a cell?

A

Nucleus

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9
Q

What is a gene?

A

Genes code for protein which determines the characteristics of the organism

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10
Q

What carried the genetic codes in the nucleus to ribosomes for protein synthesis

A

mRNA

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11
Q

What difference letter does mRNA use

A

U instead of T

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12
Q

What is ‘selectivity permeable’?

A

Allowed certain substances to pass into and out of the cell

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13
Q

How is fermentation reversible in animals?

A

When oxygen is once again present lactate is converted back into pyruvic acid

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14
Q

Name the stage of aerobic respiration and amount of energy needed

A

Glycolysis and 2 ATP

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15
Q

What is ATP when broken down to release energy

A

ADP + Pi, which needed energy to then form ATP

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16
Q

What is genetic engineering?

A

Changing a cell by plasmid or virus to use for our benefit

17
Q

What is the structure of protein

A

Proteins are made up of a chain of amino acids which determines its function and structure

18
Q

Name types of proteins

A
Antibodies 
Hormones 
Enzymes 
Transport  
Structural
Receptors
19
Q

What happens when a enzyme is denatured?

A

It changes its shapes and ruins is active site since they’re specific

20
Q

What is the Mitochondria?

A

Site of Aerobic respiration and has energy because 36 ATP

21
Q

What is a cell walls function?

A

It strengthens and shapes the cell

22
Q

What is the chloroplast function?

A

Photosynthesis takes place

23
Q

What is the Cell membranes function?

A

Controls what come in and out of the cell

24
Q

What is the cytoplasms function?

A

All chemical reactions occur here

25
Q

What is a vacuoles function?

A

Hold SAP - sugar and salts

26
Q

What is the nucleus’ function?

A

Controls cell activities and contains genetic information

27
Q

What is the ribosomes function and where is it present?

A

Site of protein synthesis and present in the cytoplasm

28
Q

What is the plasmid and what cell is it present in?

A

small circular DNA and bacterial cells

29
Q

What does the cell membrane consist of?

A

PhosphoLIPIDS and protein

30
Q

What is osmosis?

A

The movement of water molecules from a high water concentrations to a low concentration and requires no energy

31
Q

Examples of passive transport

A

Osmosis
Diffusion
Passive transport

32
Q

Where does respiration begin?

A

Cytoplasm

33
Q

What can enzymes be effected by?

A

Temperature and

pH