Biology Unit 2 Key Terms
5.0 / 5 based on 2 ratings
- Created by: Rebecca Crackett
- Created on: 27-04-13 17:08
Activation Energy
The energy barrier which must be overcome for a reaction to occur
1 of 44
Active Site
The place on an enzyme where the substrates attach and the reactions occurs
2 of 44
Adenine
A nitrogen-containing base that is part of one of the types of nucleotides that make up DNA or RNA; pairs with thymine and uracil
3 of 44
Adenosine Triphosphate (ATP)
ATP; the molecule that delivers usable chemical energy for almost all processes and reactions that a cell must undergo to survive
4 of 44
Adhesion
An attraction between the molecules of one substance and the molecules of another substance
5 of 44
Amino Acids
The organic molecules that serve as the units from which proteins are made
6 of 44
Aqueous
Watery
7 of 44
Atom
A tiny particle that is the fundamental building block of all substances and whose properties determine the properties of an element made up of only those atoms
8 of 44
Bioluminescence
Light produced by a living organsim
9 of 44
Carbohydrates
One of the four major classes of large organic molecules made from carbon, hydrogen and oxygen
10 of 44
Catalyst
A substance present in a reaction that speeds up the reaction but is not used/changed during the reaction
11 of 44
Cohesion
An attraction between molecules of the same substance
12 of 44
Covalent Bond
A bond in which electrons are shared between the bonded atoms
13 of 44
Cystosine
A nitrogen-containing base that is part of one of the types of nucleotide that makes up DNA or RNA; pairs with guanine
14 of 44
Deoxyribose
A monosaccharide; the sugar component of DNA
15 of 44
DNA
Deoxyribonucleic acid; this is the molecule, unique to each individual, carrying the genetic information to be found in every cell; all the information an organism needs to live and reproduce is contained in its DNA
16 of 44
Element
A chemical substance that contains only one kind of atom and that cannot be broken down into simpler substances
17 of 44
Enzyme
A protein that is a catalyst for chemical reactions in organisms; it increases the rate of the reaction without being used up or changed
18 of 44
Guanine
A nitrogen-containing base that is part of one of the types of nucleotide that makes up DNA or RNA; pairs with cytosine
19 of 44
Haemoglobin
A large molecule that captures oxygen from the lungs and delivers it to the rest of the body
20 of 44
Hydrogen Bond
The force of attraction between a partially charged atom and a hydrogen atom that is covalently bonded to another partially charged atom
21 of 44
Hydrophilic
water loving; soluble in water
22 of 44
Hydrophobic
water hating; insoluble in water
23 of 44
Inorganic Compound
A compound not formed from carbon-hydrogen bonds; more generally, a compound not produced by a living thing
24 of 44
Ion
An atom that has a positive or negative electrical charge
25 of 44
Ionic Bond
The force of attraction between a charged atom (or group of connected atoms) and another with the opposite charge
26 of 44
Lipid
Fats, oils, phospholipids, steroids, and waxes; one of four major classes of large organic molecules
27 of 44
Matter
Something that takes up space and has mass; solid, gas, liquid
28 of 44
Nitrogenous
Containing nitrogen
29 of 44
Nucleic Acid
One of the four major classes of large organic molecules, which are important in storing, transmitting, and making useful the information necessary for the processes of life
30 of 44
Nucleotide
A subunit of a nucleic acid that consists of a phosphate group, a five-carbon sugar, and a nitrogenous base
31 of 44
Organic Compound
Any chemical compound that contains carbon bonded to at least one other atom, usually hydrogen
32 of 44
Peptide
A compound of two or more amino acids
33 of 44
Polar Molecule
A molecule in which there are positive and negative areas
34 of 44
Proteins
One of the four major classes of large organic molecules, made of amino acids
35 of 44
Ribose
A monosaccharide; the sugar component of RNA
36 of 44
RNA
Acid; nucleic acid that uses the instructions stored in DNA to build proteins
37 of 44
Solute
A substance that dissolves in solvent
38 of 44
Solvent
A substance in which something is dissolved
39 of 44
Substrate
A molecule on which enzymes act
40 of 44
Surface Tension
The force that holds molecules together on the surface of a liquid
41 of 44
Thymine
A nitrogen-containing base that is part of one of the types of nucleotide that makes up DNA; pairs with adenine
42 of 44
Trace Element
A chemical element present in minute quantitites that is essential for the proper working of an organism
43 of 44
Uracil
A nitrogen-containing base that is part of one of the types of nucleotide that makes up RNA; pairs with adenine
44 of 44
Other cards in this set
Card 2
Front
The place on an enzyme where the substrates attach and the reactions occurs
Back
Active Site
Card 3
Front
A nitrogen-containing base that is part of one of the types of nucleotides that make up DNA or RNA; pairs with thymine and uracil
Back
Card 4
Front
ATP; the molecule that delivers usable chemical energy for almost all processes and reactions that a cell must undergo to survive
Back
Card 5
Front
An attraction between the molecules of one substance and the molecules of another substance
Back
Related discussions on The Student Room
- how to revise ? »
- How do you get A's in Biology A levels »
- How hard is it to achieve distinctions in an Access to HE course? »
- GCSE French vs A-level French »
- CIE Biology A Level »
- Business useless? »
- Access to HE midwifery »
- GCSE Exam Discussions 2024 »
- Trek To The End Of Year 13 ❀◕ ‿ ◕❀ »
- How do people get 90% + in A level Biology exams »
Similar Biology resources:
0.0 / 5
0.0 / 5
0.0 / 5
0.0 / 5
0.0 / 5
0.0 / 5
2.5 / 5 based on 2 ratings
3.5 / 5 based on 2 ratings
5.0 / 5 based on 1 rating
Teacher recommended
0.0 / 5
Comments
No comments have yet been made