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Biological Molecules

Description

AS Unit F212: Module 1
clidna
Quiz by clidna, updated more than 1 year ago
clidna
Created by clidna about 10 years ago
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Resource summary

Question 1

Question
Which part of an amino acid differs to introduce variation?
Answer
  • Amino Group (NH2)
  • Acid Group (COOH)
  • R Group

Question 2

Question
Reactions that break down molecules are called?
Answer
  • Catabolic reactions
  • Anabolic reaction

Question 3

Question
Enzymes that catalyse the breakage of peptide bonds are called?
Answer
  • Diastases
  • Lactases
  • Proteases

Question 4

Question
A peptide (covalent) bond forms between which parts of amino acids?
Answer
  • An acid group and an R group
  • An acid group and an amino group
  • An amino group and an R group

Question 5

Question
When amino acids join together it is called?
Answer
  • Synthesis
  • Hydrolysis

Question 6

Question
The name of many amino acids is?
Answer
  • Polypeptide
  • Dipeptide

Question 7

Question
There are 35 naturally occurring amino acids.
Answer
  • True
  • False

Question 8

Question
The specific sequence of amino acids is the?
Answer
  • Primary structure
  • Secondary structure

Question 9

Question
The polypeptide coiling into an alpha-helix or folding into a beta-pleated sheet is caused by?
Answer
  • Ionic bonding
  • Hydrogen bonds
  • Disulfide bridges

Question 10

Question
A disulfide bridge occurs between?
Answer
  • Cystine
  • Gylcine

Question 11

Question
The tertiary structure (proteins) is caused by which bonds?
Answer
  • Hydrophobic and hydrophilic interactions
  • Ionic bonding
  • Disulfide bridges
  • Glycosidic bonds
  • Ester bonds
  • Hydrogen bonding

Question 12

Question
Tertiary bonding forms two structures of proteins?
Answer
  • Pigment
  • Fibrous
  • Globular

Question 13

Question
Globular proteins have which roles within the body?
Answer
  • Metabolic roles
  • Structural roles

Question 14

Question
fibrous proteins usually soluble ?
Answer
  • True
  • False

Question 15

Question
Quaternary structure is?
Answer
  • More than 1 polypeptide subunit joined together
  • Further coiling and folding of a polypeptide

Question 16

Question
How many polypeptide sub-units is haemoglobin made up of?
Answer
  • 6
  • 4
  • 2
  • 3

Question 17

Question
Collagen is a fibrous protein?
Answer
  • True
  • False

Question 18

Question
How many polypeptide chains is collagen made up of?
Answer
  • 4
  • 2
  • 3
  • 6

Question 19

Question
What are the 3 main amino acids making by collagen?
Answer
  • Glycine
  • Cystine
  • Alanine
  • Proline

Question 20

Question
The role of haemoglobin is to
Answer
  • Transport O2 and CO2 around the body
  • Fight infection
  • Aid blood clotting

Question 21

Question
Haemoglobin contains a prosthetic group?
Answer
  • True
  • False

Question 22

Question
Glucose is a
Answer
  • Pentose sugar (5 carbon atoms)
  • Hexose sugar (6 carbon atoms)

Question 23

Question
In alpha glucose the hydrogen is above the hydroxyl on the 1st carbon in the ring.
Answer
  • True
  • False

Question 24

Question
Plants and animals can use beta glucose.
Answer
  • True
  • False

Question 25

Question
Monosaccharides join to form di/polysaccharides by?
Answer
  • Ester bonds
  • Glycosidic bonds
  • Hydrogen bonds
  • Peptide bonds

Question 26

Question
The disaccharide of alpha glucose is?
Answer
  • Maltose
  • Amylose

Question 27

Question
Starch is made of?
Answer
  • Amylose
  • Cellulose
  • Amylopectin
  • Glycogen

Question 28

Question
Structure of amylose?
Answer
  • Unbranched
  • Branched
  • Alpha-glucose
  • Beta-glucose
  • Coiled and compact

Question 29

Question
Structure of amylopectin?
Answer
  • Branched
  • Unbranched
  • Alpha-glucose
  • Beta-glucose

Question 30

Question
Structure of cellulose?
Answer
  • Branched
  • Unbranched
  • Straight chains= fibrils
  • Coiled and compact

Question 31

Question
Starch is made of alpha-glucose and cellulose is made of beta glucose.
Answer
  • True
  • False

Question 32

Question
Starch is made of 1 polysaccharide, cellulose is made of 2.
Answer
  • True
  • False

Question 33

Question
Both starch and cellulose are insoluble and found in plants
Answer
  • True
  • False

Question 34

Question
Starch is for structural support, cellulose is an energy store.
Answer
  • True
  • False

Question 35

Question
Glycogen is the main energy store in animals.
Answer
  • True
  • False

Question 36

Question
Structure of glycogen?
Answer
  • Branched
  • Unbranched
  • Compact
  • Joined by ester bonds
  • Joined by 1,4 glycosidic bonds
  • Alpha-glucose
  • Beta-glucose

Question 37

Question
Why has glycogen a compact and branched structure?
Answer
  • To provide support
  • For storage and breakdown

Question 38

Question
Cellulose forms straight chains linked by hydrogen bonds= microfibrils=macrofibrils for?
Answer
  • Structural support
  • Energy store

Question 39

Question
A triglyceride is made up of?
Answer
  • 1 molecule of glycerol with 4 fatty acids
  • 1 molecule of glycerol with 3 fatty acids
  • 1 molecule of glycerol with 2 fatty acids

Question 40

Question
A Phospholipid is made up of?
Answer
  • 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

Question 41

Question
The phosphate group is?
Answer
  • Hydrophilic (likes water)
  • Hydrophobic (dislikes water)

Question 42

Question
Triglycerides are used as a?
Answer
  • Molecules to stabilise the cell membrane
  • Energy storage molecule

Question 43

Question
Phospholipids make up the cell membrane bilayer as do not let water-soluble substances pass through due to?
Answer
  • No gaps for substances to pass through
  • Centre is hydrophobic (tails)
  • Outside layer is hydrophobic (heads)

Question 44

Question
Cholesterol stabilises bilayer by?
Answer
  • binding to hydrophobic tails packing them closer together
  • Creating an extra layer outside of the membrane

Question 45

Question
The test for proteins is the?
Answer
  • Biuret test
  • Ethanol emulsion test
  • Iodine test
  • Benedict's test

Question 46

Question
Positive result for starch using iodine solution is?
Answer
  • yellow/brown ----> blue/black
  • yellow/brown ----> purple/blue
  • yellow/brown ----> red/orange

Question 47

Question
The concentration of glucose say be determined by?
Answer
  • Benedict's solution
  • A colorimeter

Question 48

Question
A colorimeter works by?
Answer
  • Measuring the amount of light passing through the sample.
  • Comparing the colour to a defined scale.

Question 49

Question
The more Cu(II)SO4 used up in Benedict's test the more light will be transmitted.
Answer
  • True
  • False

Question 50

Question
Precipitation will be filtered out before using a colorimeter?
Answer
  • True
  • False
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