722159
Questão 1
Questão
Which part of an amino acid differs to introduce variation?
Responda
-
Amino Group (NH2)
-
Acid Group (COOH)
-
R Group
Questão 2
Questão
Reactions that break down molecules are called?
Responda
-
Catabolic reactions
-
Anabolic reaction
Questão 3
Questão
Enzymes that catalyse the breakage of peptide bonds are called?
Responda
-
Diastases
-
Lactases
-
Proteases
Questão 4
Questão
A peptide (covalent) bond forms between which parts of amino acids?
Responda
-
An acid group and an R group
-
An acid group and an amino group
-
An amino group and an R group
Questão 5
Questão
When amino acids join together it is called?
Responda
-
Synthesis
-
Hydrolysis
Questão 6
Questão
The name of many amino acids is?
Responda
-
Polypeptide
-
Dipeptide
Questão 7
Questão
There are 35 naturally occurring amino acids.
Responda
- True
- False
Questão 8
Questão
The specific sequence of amino acids is the?
Responda
-
Primary structure
-
Secondary structure
Questão 9
Questão
The polypeptide coiling into an alpha-helix or folding into a beta-pleated sheet is caused by?
Responda
-
Ionic bonding
-
Hydrogen bonds
-
Disulfide bridges
Questão 10
Questão
A disulfide bridge occurs between?
Responda
-
Cystine
-
Gylcine
Questão 11
Questão
The tertiary structure (proteins) is caused by which bonds?
Responda
-
Hydrophobic and hydrophilic interactions
-
Ionic bonding
-
Disulfide bridges
-
Glycosidic bonds
-
Ester bonds
-
Hydrogen bonding
Questão 12
Questão
Tertiary bonding forms two structures of proteins?
Responda
-
Pigment
-
Fibrous
-
Globular
Questão 13
Questão
Globular proteins have which roles within the body?
Responda
-
Metabolic roles
-
Structural roles
Questão 14
Questão
fibrous proteins usually soluble ?
Responda
- True
- False
Questão 15
Questão
Quaternary structure is?
Responda
-
More than 1 polypeptide subunit joined together
-
Further coiling and folding of a polypeptide
Questão 16
Questão
How many polypeptide sub-units is haemoglobin made up of?
Responda
-
6
-
4
-
2
-
3
Questão 17
Questão
Collagen is a fibrous protein?
Responda
- True
- False
Questão 18
Questão
How many polypeptide chains is collagen made up of?
Responda
-
4
-
2
-
3
-
6
Questão 19
Questão
What are the 3 main amino acids making by collagen?
Responda
-
Glycine
-
Cystine
-
Alanine
-
Proline
Questão 20
Questão
The role of haemoglobin is to
Responda
-
Transport O2 and CO2 around the body
-
Fight infection
-
Aid blood clotting
Questão 21
Questão
Haemoglobin contains a prosthetic group?
Responda
- True
- False
Questão 22
Questão
Glucose is a
Responda
-
Pentose sugar (5 carbon atoms)
-
Hexose sugar (6 carbon atoms)
Questão 23
Questão
In alpha glucose the hydrogen is above the hydroxyl on the 1st carbon in the ring.
Responda
- True
- False
Questão 24
Questão
Plants and animals can use beta glucose.
Responda
- True
- False
Questão 25
Questão
Monosaccharides join to form di/polysaccharides by?
Responda
-
Ester bonds
-
Glycosidic bonds
-
Hydrogen bonds
-
Peptide bonds
Questão 26
Questão
The disaccharide of alpha glucose is?
Responda
-
Maltose
-
Amylose
Questão 27
Questão
Starch is made of?
Responda
-
Amylose
-
Cellulose
-
Amylopectin
-
Glycogen
Questão 28
Questão
Structure of amylose?
Responda
-
Unbranched
-
Branched
-
Alpha-glucose
-
Beta-glucose
-
Coiled and compact
Questão 29
Questão
Structure of amylopectin?
Responda
-
Branched
-
Unbranched
-
Alpha-glucose
-
Beta-glucose
Questão 30
Questão
Structure of cellulose?
Responda
-
Branched
-
Unbranched
-
Straight chains= fibrils
-
Coiled and compact
Questão 31
Questão
Starch is made of alpha-glucose and cellulose is made of beta glucose.
Responda
- True
- False
Questão 32
Questão
Starch is made of 1 polysaccharide, cellulose is made of 2.
Responda
- True
- False
Questão 33
Questão
Both starch and cellulose are insoluble and found in plants
Responda
- True
- False
Questão 34
Questão
Starch is for structural support, cellulose is an energy store.
Responda
- True
- False
Questão 35
Questão
Glycogen is the main energy store in animals.
Responda
- True
- False
Questão 36
Questão
Structure of glycogen?
Responda
-
Branched
-
Unbranched
-
Compact
-
Joined by ester bonds
-
Joined by 1,4 glycosidic bonds
-
Alpha-glucose
-
Beta-glucose
Questão 37
Questão
Why has glycogen a compact and branched structure?
Responda
-
To provide support
-
For storage and breakdown
Questão 38
Questão
Cellulose forms straight chains linked by hydrogen bonds= microfibrils=macrofibrils for?
Responda
-
Structural support
-
Energy store
Questão 39
Questão
A triglyceride is made up of?
Responda
-
1 molecule of glycerol with 4 fatty acids
-
1 molecule of glycerol with 3 fatty acids
-
1 molecule of glycerol with 2 fatty acids
Questão 40
Questão
A Phospholipid is made up of?
Responda
-
1 molecule of glycerol with 3 fatty acids
-
1 molecule of glycerol with 3 fatty acids and a phosphate group
-
1 molecule of glycerol with 2 fatty acids and a phosphate group
Questão 41
Questão
The phosphate group is?
Responda
-
Hydrophilic (likes water)
-
Hydrophobic (dislikes water)
Questão 42
Questão
Triglycerides are used as a?
Responda
-
Molecules to stabilise the cell membrane
-
Energy storage molecule
Questão 43
Questão
Phospholipids make up the cell membrane bilayer as do not let water-soluble substances pass through due to?
Responda
-
No gaps for substances to pass through
-
Centre is hydrophobic (tails)
-
Outside layer is hydrophobic (heads)
Questão 44
Questão
Cholesterol stabilises bilayer by?
Responda
-
binding to hydrophobic tails packing them closer together
-
Creating an extra layer outside of the membrane
Questão 45
Questão
The test for proteins is the?
Responda
-
Biuret test
-
Ethanol emulsion test
-
Iodine test
-
Benedict's test
Questão 46
Questão
Positive result for starch using iodine solution is?
Responda
-
yellow/brown ----> blue/black
-
yellow/brown ----> purple/blue
-
yellow/brown ----> red/orange
Questão 47
Questão
The concentration of glucose say be determined by?
Responda
-
Benedict's solution
-
A colorimeter
Questão 48
Questão
A colorimeter works by?
Responda
-
Measuring the amount of light passing through the sample.
-
Comparing the colour to a defined scale.
Questão 49
Questão
The more Cu(II)SO4 used up in Benedict's test the more light will be transmitted.
Responda
- True
- False
Questão 50
Questão
Precipitation will be filtered out before using a colorimeter?
Responda
- True
- False
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