WorksheetsBiology S1: Unit 2 - Part 1
Total questions: 15
Worksheet time: 9mins
Which atoms are in all carbohydrates?
carbon, nitrogen, oxygen
carbon, phosphorus, oxygen
carbon, hydrogen, nitrogen
carbon, hydrogen, oxygen
Which type of macromolecule is the sugar fructose?
Protein
Lipid
Carbohydrate
Nucleic acid
Which statement best explains how the structure of a starch molecule relates to its function?
A branching structure provides many points where enzyme digestion can take place and release glucose molecules.
A branching structure makes the molecule stronger.
A branching structure has more chemical bonds than an unbranched structure.
A branching structure contains bonds that are harder to break.
Which characteristic do glycogen and starch share?
Both are storage forms of glucose.
They are the most energy-rich organic molecules.
They are proteins.
Both are difficult to digest.
Most lipids contain long chains of which two atoms?
water and phosphorus
carbon and hydrogen
carbon and oxygen
water and carbon
Which statement best relates to how the structure of a lipid influences the lipid’s function?
A phospholipid has a charged head and an uncharged tail.
A lipid is made up of a long chain of phosphorus molecules.
The ends of the lipid are attached to each other.
Lipids contain fatty acids and glycerol.
All amino acids have a central carbon with four components attached to it. One of these components is called the R group.
Which statement best describes the R group?
The R group stabilizes the amino acid.
The R group helps the amino acid replicate.
The R group gives the amino acid unique characteristics.
The R group is the same in all amino acids.
Chitinase is an enzyme that breaks down the chitin molecules in the insect exoskeleton.
The sequence of amino acids in the chitinase is an example of which level of protein structure?
Primary
Secondary
Teriary
Quaternary
The amount of energy needed for a reaction to take place is the activation energy. Enzymes can lower the activation energy of a chemical reaction.
Which statement describes a way that this could happen?
Molecules can be brought together so they will bond more easily.
The enzyme distributes ATP to cells and then is destroyed.
More substrate is added by the enzyme.
The enzyme separates molecules from each other.
What is one way that RNA differs from DNA?
It is not soluble in water.
It has no nucleus.
It is single-stranded.
It forms a double helix.
Which molecule do mammals use to store extra glucose in their muscles?
Myosin
Glycogen
Baleen
Starch
Which molecule do plants use to store extra glucose?
Myosin
Glycogen
Baleen
Starch
Which element is present in all amino acids, but not necessarily in fats or carbohydrates?
Oxygen
Hydrogen
Carbon
Nitrogen
Which statement best describes the role of DNA in the body?
It provides a quick form of energy.
It provides long-term energy storage.
It contains genetic information.
It speeds up chemical reactions.
Which statement best explains how enzymes speed up chemical reactions?
Enzymes use light energy to speed up chemical reactions.
Enzymes gain heat from chemical reactions.
Enzymes lower the activation energy of a reaction.
Enzymes change shape during chemical reactions.
