Page 1 (As) Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Activation energy

A

Energy required to bring about a reaction.

the activation energy is lowered by the presence of enzymes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Active immunity

A

Resistance to disease resulting from the activities of an individuals own immune system whereby an antigen induced plasma cells to produce antibodies

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Active site

A

A group of amino acids that makes up the region of an enzyme into the which the substrate fits in order to catalyse a reaction.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Active transport

A

Movement of a substance from a region where it is in a low concentration to a region where it is in a high concentration.

Process requires expenditure of metabolic energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Aerobic

A

Connected with the presence of of free oxygen. Aerobic respiration requires free oxygen to release energy from glucose.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Allele

A

One of a number of alternative forms of a gene.

Eg) the gene for the shape of pea seeds has 2 alleles.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Allergen

A

A normally harmless substance that causes the immune system to produce an immune response.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Allergy

A

The response of the immune system to an allergen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Antibotic

A

A substance produced by living organisms that can destroy or inhibit yeh growth of microorganisms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Antibiotic resistance

A

The development in microorganisms of mechanisms that prevent antibiotics from killing them

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Antibody

A

A protein produced by lymphocytes in response to the presence of the appropriate antigen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Anticodon

A

A sequence of 3 adjacent nucleotides on a molecule of transfer RNA that is complementary to a particular codon on a messenger RNA molecule

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Antigen

A

A molecule that triggers an immune response by lymphocytes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Antioxidant

A

Chemical which reduces or prevents oxidation.

Often used as an additive to prolong food shelf life

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Apoplastic pathway

A

Route through the cell walls and intercellular spaces of plants by which water and dissolved substances are transported

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Artificial selection

A

Breeding of organisms by human selection of parents/gametes in order to perpetuate certain characteristics

17
Q

Asthma

A

A chronic illness in which there is resistance to air flow to the alveoli of the lungs as a result of the airways becoming inflamed due to an allergic reaction to an allergen

18
Q

Atheroma

A

Fatty deposits in the walls of arteries soften associated with high cholesterol levels in the blood

19
Q

ATP

A

Nucleotide found in all living organisms which is produced during respiration and is important in the transfer of energy

20
Q

Autosomes

A

A chromosome which is not a sex chromosome

21
Q

Accuracy

A

A measurement result is considered accurate if it is judged to be close to the true value