NST1501 assignment 3 2022
1
, Question 1
1.1 It is ionic, covalent and metallic bonds
1.2 a) Atom-An atom is the basic building blocks of matter. Atoms can join
together to form molecules.
b) Compound- When two or more elements are joined together
through chemical bonds they become compound.
c) Element- An element is a substance that consists of only one type of
atom and it cannot be broken down.
d) inorganic compound- Any substance in which two or more chemical
elements are combined, nearly always in definite proportions.
1.3) Passive Transport-It is the simplest method of transport and is
dependent upon the concentration gradient and the size and charge of the
solute. In passive transport, small uncharged solute particles diffuse across
the membrane until both sides of the membrane have reached an
equilibrium that is similar in concentration.
Facilitated diffusion- It allows the passage of lip phobic molecules through
the cell membrane’s lipid bilayer. Just as in passive transport, molecules,
particles, and ions travel freely across the cellular membrane from high
concentration to low concentration in an attempt to achieve equilibrium
and thereby increase the entropy of the system.
Active transport-Is the movement of particles through a transport protein
from low concentration to high concentration at the expense of metabolic
energy. The most common energy source used by cells is adenosine
triphosphate.
1.4) Cell wall- Surrounds and protects the cell. It also makes the cell stiff
and strong.
Cell membrane- Hold and protects the cell. Controls the movement of
materials in and out of the cell.
Cytoplasm- A watery, gel-like material in which cell parts move.
2
1
, Question 1
1.1 It is ionic, covalent and metallic bonds
1.2 a) Atom-An atom is the basic building blocks of matter. Atoms can join
together to form molecules.
b) Compound- When two or more elements are joined together
through chemical bonds they become compound.
c) Element- An element is a substance that consists of only one type of
atom and it cannot be broken down.
d) inorganic compound- Any substance in which two or more chemical
elements are combined, nearly always in definite proportions.
1.3) Passive Transport-It is the simplest method of transport and is
dependent upon the concentration gradient and the size and charge of the
solute. In passive transport, small uncharged solute particles diffuse across
the membrane until both sides of the membrane have reached an
equilibrium that is similar in concentration.
Facilitated diffusion- It allows the passage of lip phobic molecules through
the cell membrane’s lipid bilayer. Just as in passive transport, molecules,
particles, and ions travel freely across the cellular membrane from high
concentration to low concentration in an attempt to achieve equilibrium
and thereby increase the entropy of the system.
Active transport-Is the movement of particles through a transport protein
from low concentration to high concentration at the expense of metabolic
energy. The most common energy source used by cells is adenosine
triphosphate.
1.4) Cell wall- Surrounds and protects the cell. It also makes the cell stiff
and strong.
Cell membrane- Hold and protects the cell. Controls the movement of
materials in and out of the cell.
Cytoplasm- A watery, gel-like material in which cell parts move.
2
