hubs 1406 exam prep | UPDATED Questions with 100% Verified
Answers
Question:
What are the four major elements of the body?
Answer:
Oxygen, carbon, hydrogen and nitrogen.
Question:
What is an ion?
Answer:
An atom that has gained or lost electrons and therefore carries
a charge.
Question:
What is a cation?
Answer:
A positively charged ion formed when an atom loses
electrons.
Question:
What is an anion?
Answer:
A negatively charged ion formed when an atom gains
electrons.
Question:
What is an electrolyte?
Answer:
A substance that dissolves in water and forms ions, allowing
it to conduct electricity.
Question:
What is pH?
, Answer:
A measure of acidity or alkalinity based on hydrogen ion
concentration.
Question:
What is an acid?
Answer:
A substance that releases hydrogen ions (H⁺) in solution.
Question:
What is a base (alkali)?
Answer:
A substance that accepts hydrogen ions or releases OH⁻ ions.
Question:
What is an ionic bond?
Answer:
A bond formed when one atom transfers electrons to another.
Question:
What is a covalent bond?
Answer:
A bond where atoms share electrons.
Question:
What is a polar covalent bond?
Answer:
A bond where electrons are shared unequally.
Question:
What is a non-polar covalent bond?
Answer:
A bond where electrons are shared equally.
,Question:
What are carbohydrates?
Answer:
Molecules made of carbon, hydrogen and oxygen that provide
energy for the body.
Question:
What are proteins?
Answer:
Large molecules made of amino acids that function in
structure, enzymes and transport.
Question:
What are lipids?
Answer:
Hydrophobic molecules used for energy storage, insulation
and cell membranes.
Question:
What are nucleotides?
Answer:
Molecules that form DNA and RNA and carry genetic
information.
Question:
What is an enzyme?
Answer:
A biological catalyst that speeds up chemical reactions.
Question:
What is hydrophobic?
, Answer:
A molecule that does not interact with water.
Question:
What is hydrophilic?
Answer:
A molecule that interacts with water.
Question:
What is the function of the nucleus?
Answer:
It stores DNA and controls cell activities.
Question:
What is DNA?
Answer:
A double helix molecule that stores genetic instructions.
Question:
What is a chromosome?
Answer:
A condensed structure of DNA and proteins carrying genetic
information.
Question:
What is a chromatid?
Answer:
One of the two identical copies of a replicated chromosome.
Question:
What is a karyotype?
Answer:
An organised image of a cell's chromosomes.
Answers
Question:
What are the four major elements of the body?
Answer:
Oxygen, carbon, hydrogen and nitrogen.
Question:
What is an ion?
Answer:
An atom that has gained or lost electrons and therefore carries
a charge.
Question:
What is a cation?
Answer:
A positively charged ion formed when an atom loses
electrons.
Question:
What is an anion?
Answer:
A negatively charged ion formed when an atom gains
electrons.
Question:
What is an electrolyte?
Answer:
A substance that dissolves in water and forms ions, allowing
it to conduct electricity.
Question:
What is pH?
, Answer:
A measure of acidity or alkalinity based on hydrogen ion
concentration.
Question:
What is an acid?
Answer:
A substance that releases hydrogen ions (H⁺) in solution.
Question:
What is a base (alkali)?
Answer:
A substance that accepts hydrogen ions or releases OH⁻ ions.
Question:
What is an ionic bond?
Answer:
A bond formed when one atom transfers electrons to another.
Question:
What is a covalent bond?
Answer:
A bond where atoms share electrons.
Question:
What is a polar covalent bond?
Answer:
A bond where electrons are shared unequally.
Question:
What is a non-polar covalent bond?
Answer:
A bond where electrons are shared equally.
,Question:
What are carbohydrates?
Answer:
Molecules made of carbon, hydrogen and oxygen that provide
energy for the body.
Question:
What are proteins?
Answer:
Large molecules made of amino acids that function in
structure, enzymes and transport.
Question:
What are lipids?
Answer:
Hydrophobic molecules used for energy storage, insulation
and cell membranes.
Question:
What are nucleotides?
Answer:
Molecules that form DNA and RNA and carry genetic
information.
Question:
What is an enzyme?
Answer:
A biological catalyst that speeds up chemical reactions.
Question:
What is hydrophobic?
, Answer:
A molecule that does not interact with water.
Question:
What is hydrophilic?
Answer:
A molecule that interacts with water.
Question:
What is the function of the nucleus?
Answer:
It stores DNA and controls cell activities.
Question:
What is DNA?
Answer:
A double helix molecule that stores genetic instructions.
Question:
What is a chromosome?
Answer:
A condensed structure of DNA and proteins carrying genetic
information.
Question:
What is a chromatid?
Answer:
One of the two identical copies of a replicated chromosome.
Question:
What is a karyotype?
Answer:
An organised image of a cell's chromosomes.
