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Cards (41)
What type of questions is the video discussing?
Hard questions from a
QA
biology paper
one.
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What is the purpose of the video?
To guide viewers through difficult
biology
exam
questions.
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What should students focus on according to the video?
What the
examiners
are looking for in
answers
.
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How should students structure their answers to comparison questions?
By addressing
similarities
and
differences
in detailed paragraphs.
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What organelle is common to both plant and animal cells?
The
nucleus
.
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What is the function of the mitochondria?
It is responsible for turning sugar into energy through
respiration
.
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What are ribosomes responsible for?
Producing
proteins
.
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What is the role of the cell membrane?
It controls the movement of
substances
in and out of the cell.
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What is the cytoplasm's function?
It is where
cellular
reactions take place.
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What organelle is responsible for maintaining the shape and structure of plant cells?
The large
vacuole
.
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Where does photosynthesis take place in plant cells?
In the
chloroplasts
.
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What structure prevents plant cells from bursting?
The
cell wall
.
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What is the process of mitosis?
It is the division of a cell to form two identical
daughter cells
.
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What is required for mitosis to occur?
The cell must grow to a certain size and
replicate
its DNA.
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What happens to chromosomes during mitosis?
They line up in the middle and are pulled to
opposite
poles of the cell.
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What is the role of enzymes in biological reactions?
They have an
active site
specific for their substrate, facilitating reactions.
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What happens when a substrate fits into an enzyme's active site?
The enzyme either
breaks
it down or
converts
it into something new.
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What is the pathway of blood through the heart?
Blood enters through the
vena cava
, goes to the right
atrium
, right
ventricle
, lungs, left atrium, left ventricle, and out via the
aorta
.
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What is the function of valves in the heart?
To prevent blood from flowing
backward
.
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What happens to blood when it reaches the lungs?
It picks up oxygen and becomes
oxygenated
.
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What is the only artery that carries deoxygenated blood?
The
pulmonary artery
.
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What happens to oxygenated blood after it leaves the lungs?
It re-enters the heart through the
pulmonary vein
.
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What is the pathway of blood from the left atrium to the rest of the body?
It moves down through the valve into the
left ventricle
and is pumped out via the
aorta
.
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Why is the muscle on the left side of the heart larger than the right side?
It pumps blood throughout the
entire
body, requiring more strength.
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What is the role of the small intestine in digestion?
It absorbs
nutrients
from digested food.
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What are the two types of digestion that occur in the digestive system?
Mechanical digestion
and
enzyme digestion
.
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Where does mechanical digestion primarily occur?
In the
mouth
and
stomach
.
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What enzyme breaks down carbohydrates?
Amylase
.
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What enzyme breaks down fats?
Lipase
.
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What enzyme breaks down proteins?
Protease
.
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Where are digestive enzymes produced?
In the
pancreas
.
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What is the function of bile?
To neutralize
stomach acid
and
emulsify
fats.
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What happens to food after it is broken down in the small intestine?
It moves through to the
large intestine
where water is
reabsorbed
.
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What are the three key features of the small intestine that aid in absorption?
Thin walls
,
large blood supply
, and villi for a large
surface area
.
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How does the structure of the small intestine facilitate nutrient absorption?
Its thin walls allow easy passage of food particles, and
villi
increase surface area.
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What factors limit the rate of photosynthesis?
Supply of
reactants
, light intensity, temperature, and availability of
chlorophyll
.
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What is the balanced equation for photosynthesis?
6CO<sub>2</sub> + 6H<sub>2</sub>O +
light energy
→
C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>
+ 6O<sub>2</sub>.
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How does temperature affect the rate of photosynthesis?
It increases up to an
optimal
point, then decreases if too high.
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What happens to proteins at high temperatures?
They can
denature
and lose their function.
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What is oxygen debt?
It occurs when glucose is broken down
anaerobically
into
lactic acid
, releasing little energy.
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See all 41 cards
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