B2 Key Words and Meaning

HideShow resource information
Active Site
Site on enzyme molecule that has special shape that holds substrate
1 of 51
Active transport
Movement of molecule against concentration gradient using energy
2 of 51
A base in DNA that pairs with thymine
3 of 51
Adult stem cell
A stem cell in differentiated tissue that can produce a few kinds of cells
4 of 51
Aerobic respiration
Respiration that needs oxygen
5 of 51
Alimentary canal
The muscular tube that runs from the mouth to the anus
6 of 51
Different types of a gene eg- brown eyes, blue eyes
7 of 51
Carbohydrase enzyme that turns starch to sugar
8 of 51
Amino acids
A small molecule that is the building block of protein
9 of 51
Anaerobic respiration
Respiration that does not need oxygen
10 of 51
Proteins that bind to microorganism and destroys them
11 of 51
Major artery leading away from the heart
12 of 51
Vessels that transport blood away from the heart
13 of 51
Asexual reproduction
Formation of a new individual identical to its parents using mitosis
14 of 51
Chemicals that link two strands of DNA (adenine, thymine, guanine, cytosine)
15 of 51
Base pair
Complementary bases always pair up in the same way
16 of 51
Base triplet
Three bases that code for an amino acid
17 of 51
Benedict's test
Blue liquid which turns orangery-red when heated with reducing sugar
18 of 51
Substance in food that the body uses to make vitamin A
19 of 51
Example of probiotic bacteria
20 of 51
Alkaline substance stored in gall bladder that helps fat digestion
21 of 51
Bile duct
Tube that connects gall bladder to small intestine
22 of 51
Variety of species present in a given area
23 of 51
A ball-shaped mass of chewed food
24 of 51
Blood vessels
Tubes that carry blood around the body
25 of 51
Tiny blood vessels with thin walls that allow diffusion of substances in and out
26 of 51
Enzymes which catalyse the breakdown of carbohydrates to sugar
27 of 51
Compound made of carbon, hydrogen and oxygen used for energy
28 of 51
Cardiac output
Volume of blood that the heart pumps put in one minute (stroke volume x heart rate)
29 of 51
Cell membrane
Semi-permeable barrier around outer surface of cytoplasm
30 of 51
Basic unit of life in which reactions to sustain life take lace
31 of 51
Cell walls are made of tough cellulose to support and shape the cell
32 of 51
Green pigment which absorbs light energy
33 of 51
Organelle in plant cells containing chlorophyll. Where photosynthesis happens
34 of 51
Fat made in the liver and carried in the blood. High levels increase risk of heart disease.
35 of 51
Chromosomal DNA
DNA which makes up the chromosomes of a cell
36 of 51
Thread-like structures in the nucleus which carry genetic information
37 of 51
Circulatory system
Organ system including the heart and blood vessels, carrying blood around the body
38 of 51
Individual genetically identical to parent created by asexual reproduction
39 of 51
Concentration gradient
When a solute is gradually increasing concentration from one area to another
40 of 51
The liquid gel that makes up a cell. Where many reactions take place
41 of 51
A base in DNA that pairs with guanine
42 of 51
Duaghter cell
Cell produced from the division of a parent
43 of 51
To break down or change shape, as proteins denature with excess heat
44 of 51
Without oxygen
45 of 51
Deoxyribonucleic acid (DNA)
Chemical that makes chromosomes and genes
46 of 51
Specialise, develop into different types eg. cells becoming blood, bone, nerves, ect
47 of 51
Random movement of particles from high concentration to low concentration
48 of 51
Breakdown of large, insoluble molecules into smaller, soluble ones
49 of 51
Digestive system
System of organs responsible for breakdown and absorption of food
50 of 51
A cell that has two sets of chromosomes. In humans, this is every cell except gametes
51 of 51

Other cards in this set

Card 2


Movement of molecule against concentration gradient using energy


Active transport

Card 3


A base in DNA that pairs with thymine


Preview of the back of card 3

Card 4


A stem cell in differentiated tissue that can produce a few kinds of cells


Preview of the back of card 4

Card 5


Respiration that needs oxygen


Preview of the back of card 5
View more cards


No comments have yet been made

Similar Science resources:

See all Science resources »See all Biology resources »