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