degree of attraction, ie Haemoglobin has a high affinity for oxygen
1 of 25
Allele
An alternative form of a gene
2 of 25
Amylopectin
One of the two polysaccharides which make up starch. A branched polymer of starch
3 of 25
Amylose
One of the two polysaccharides which make up starch. An unbranched polymer of glucose
4 of 25
Anaphase
phase of mitosis at which the chromatids split and are pulled to the opposite poles by spindle fibres
5 of 25
antibiotic
an antibacterial drug such as penicillin
6 of 25
artificial selection
Selective breeding where human activity directs natural selection
7 of 25
Bacteria
Single celled prokaryotic organism
8 of 25
Base
ne of four nitrogen-containing compounds that fit together (like jigsaw pieces) In DNA they are Adenine Thymine Cytosine and Guanine
9 of 25
Binomial
Having two names
10 of 25
Biodiversity
A measure of the number of different species in a particular ecosystem
11 of 25
Blind trial
A trial in which the patient does not know whether they have been given an active drug or a placebo
12 of 25
Bohr effect
name given to the fact that in the presence of carbon dioxide, the affinity of haemoglobin for oxygen is lower
13 of 25
bottleneck
situation when a population recovers from a small number of individuals. The new population is likely to show low variation sine many alleles have been lost from the gene pool
14 of 25
Casparian *****
layer of waterproof material around the endodermis in a plant root. Its function is to block the apoplast pathway
15 of 25
cellulase
enzyme that breaks down cellulose
16 of 25
cell wall
outer protective coat of secreted by cells of certain organisms. Plant cells always have one made of cellulose
17 of 25
Cellulose
Unbranched polymer of beta glucose.
18 of 25
Chiasmata
The point of cross over in meiosis
19 of 25
Chloroplast
Plant organelle that is the site of photosynthesis
20 of 25
Chromatid
One half of a double chromosome
21 of 25
Chromosome
condensed mass of DNA that appears just before cell division. Each chromosome is one super-coiled DNA molecule containing thousands of genes.
22 of 25
Clone
An identical gene copy
23 of 25
Cohesion tension
mechanism by which water passes up the xylem of a plant from the roots to the leaves. The cohesion of water allows continuous columns under great tension
24 of 25
conjugation
mechanism of gene transfer between bacteria in direct contact of each other
25 of 25
Other cards in this set
Card 2
Front
An alternative form of a gene
Back
Allele
Card 3
Front
One of the two polysaccharides which make up starch. A branched polymer of starch
Back
Card 4
Front
One of the two polysaccharides which make up starch. An unbranched polymer of glucose
Back
Card 5
Front
phase of mitosis at which the chromatids split and are pulled to the opposite poles by spindle fibres
Comments
No comments have yet been made