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WorksheetsFood molecules: Structure and bonding
Total questions: 25
Worksheet time: 27mins
Which of the following substances would be highly water soluble
Glucose and fructose
Flour and corn starch
leucine and isoleucine
oleic acid and lauric acid
The monomer of a protein is
Fatty Acid
Glucose
Amino Acid
Glycerol
Examples of food which contain a lot of carbohydrates are:
fish, nuts, oil
bread, pasta, noodles
meat, seeds
apples, broccoli
We need lipids to
build cell walls
build cell membranes
make the nucleus
make the cytoplasm
The monomers of lipids are:
fatty acid and amino acids
glucose and glycerol
glucose and amino acids
fatty acids and glycerol
Animals store carbohydrates as _____________
glucose
glycogen
starch
glycerol
Some monomers of carbohydrates are:
glucose and fructose
glycogen and glycerol
glucose and amino acids
fatty acids and fructose
Proteins are used for ______________
energy and building cell walls
growth, repair and enzymes
insulation and building cell membranes
respiration and enzymes
Plants store carbohydrates as ________
Starch
Glucose
Glycogen
Chlorophyll
Which of the following biological molecules contains the element nitrogen?
carbhydrates
proteins
fats
all of the above
Which of the following biological molecules contains the elements carbon, hydrogen and oxygen?
I. carbohydrates
II. proteins
III. fats
I and II only
I and III only
II and III only
I, II and III
Which of the following is a good solvent in the body?
fat
protein
carbohydrate
water
Which carbohydrate is used for respiration?
cellulose
glucose
starch
glycogen
Which of the following biological molecules contain a type of acid?
I. carbohydrates
II. fats
III. proteins
I and II only
I and III only
II and III only
I, II and III
Which type of biological molecule is depicted in this crude diagram?
carbohydrate
fat
protein
vitamin
Which of the following describes the secondary structure of proteins?
The sequence of amino acids
The α-helix and β-pleated sheet folding
The folding of the polypeptide chain due to the 'R' groups
The joining of different protein molecules to make one big molecule
Why is folding so important in proteins?
It gives them a unique, functional shape
It makes them look tidier
It makes every protein molecule different from the next even if they are the same type
The folding is random so is not that important at all
The main bonding in the secondary structure of a protein is due to.....
covalent bonding
ionic bonding
hydrogen bonding
polar bonding
What gives a protein its unique shape?
the unique sequence of amino acids in its polypeptide chain
the unique folding due to the sequence of amnio acids in the polypeptide chain
hydrogen bonding & unique interactions between the 'R' groups
all of these
How many different amino acids are there in naturally-formed human proteins?
15
20
25
30
When proteins are placed in water, hydrophobic side chains are
attracted to hydrophilic molecules
attracted to water molecules
attracted to the outside of the protein
attracted to other hydrophobic side chains
The -COOH group of an amino acid can
lose a proton and become negatively charged
lose a proton and become positively charged
gain a proton and become negatively charged
gain a proton and become positively charged
In an acidic environment amino acids
act as a base and become a cation
act as a base and become a anion
act as an acid and become a cation
act as an acid and become a anion
When an amino acid is in the zwitterion form,
-COO is negative and -NH3 is positive
-COO is positive and -NH3 is negative
there is an overall positive charge
there is an overall negative charge
Using the data booklet, which amino acid has a methyl group (-CH3) as its sidechain (R-group)?
aspartic acid
alanine
cysteine
glycine
