The Ultimate Protein Quiz. AS Biology OCR.

Questions in protein, the structure of proteins, examples of proteins and their functions 

?
  • Created by: Jade
  • Created on: 28-10-11 16:20
The monomers of proteins are...?
Amino acids
1 of 26
Two amino acids joined together form a....
Dipeptide
2 of 26
Several amino acids joined in a chain is a ....?
Polypeptide
3 of 26
How many different amino acids are there?
20
4 of 26
What is the most simplest form of the R-group?
H
5 of 26
What kind of reaction produces the peptide bond?
Condensation reaction
6 of 26
What is the primary structure of a protein?
The primary structure of a protein is given by the specific sequence of amino acids that make up the protein.
7 of 26
Enzymes that catalyze the breaking of peptide bonds are know as ______________.
Protease enzymes
8 of 26
What is the secondary structure?
The secondary structure is formed when the chain of amino acid coils or folds to form an alpha helix or a beta pleated sheet. Hydrogen bonds hold the coils in place.
9 of 26
What is the tertiary structure?
The tertiary structure is the final three dimensional shape of a protein is formed when these coils and pleats themselves coil or fold. This 3D shape is held in place by a number of different types of bonds and interactions.
10 of 26
Heating a protein increases the kinetic.This causes the molecule to vibrate,most bonds are quite weak so easily broken. Whole tertiary structure can unravel and protein will no longer function. This is called?
Denaturation
11 of 26
Fibrous proteins usually have structural roles while Globular usually have...
Metabolic roles
12 of 26
An example of a globular protein is ...?
Enzymes found in all organisms. Plasma proteins and antibodies found in the blood of mammals.
13 of 26
An example of a fibrous protein is?
Collagen found in bone and cartilage. Keratin found in fingernails and hair.
14 of 26
Tertiary structure in proteins is stabilised by a number of bonds such as...?
Disulfide bonds, Ionic bonds, Hydrogen bonds, Hydrophobic and hydrophilic interactions.
15 of 26
What is the quaternary structure?
Quaternary structure refers to the fact that some proteins are made up of more than one polypeptide subunit joined together, or polypeptide and an inorganic component.
16 of 26
Examples of proteins with quaternary structure include....
Insulin and Haemoglobin
17 of 26
Haemoglobin's quaternary structure consists of four polypeptide subunits. Two are called _______ and the other two are ________. The four subunits together form one haemoglobin molecule, which is a water soluble globular protein.
Alpha chains, beta chains
18 of 26
Haemoglobin's function is to carry oxygen from the lungs to the ____. It binds oxygen in the lungs and releases it in the tissues. A specialised part of each polypeptide, called a _______ is responsible for the ____ of haemoglobin
tissues, haem group,colour
19 of 26
One complete haemoglobin molecule can bind to up to ______ oxygen molecules.
Four
20 of 26
The haem group is NOT made of amino acids. It is called a __________?
Prosthetic group
21 of 26
Collagen is a _________ protein.
Fibrous
22 of 26
A collagen molecule is made up of ________ polypeptide chains.
Three
23 of 26
_______________bonds form between the chains, which gives the structure strength.
Hydrogen
24 of 26
The strength of the molecule is increased further because each collagen molecule forms __________called cross-links with other collagen molecules next to it.
Covalent bonds
25 of 26
What is the function of collagen?
Mechanical strength in many areas
26 of 26

Other cards in this set

Card 2

Front

Two amino acids joined together form a....

Back

Dipeptide

Card 3

Front

Several amino acids joined in a chain is a ....?

Back

Preview of the front of card 3

Card 4

Front

How many different amino acids are there?

Back

Preview of the front of card 4

Card 5

Front

What is the most simplest form of the R-group?

Back

Preview of the front of card 5
View more cards

Comments

Hannah

Report

Only got one wrong! Great quiz!

simran

Report

very helpfull. thankx

Similar Biology resources:

See all Biology resources »