Edexcel IGCSE Biology Exam Questions
& Answers
M - MRSHGREN - ANSWERSmovement, for all or part of the organism
R - MRSHGREN - ANSWERSrespiration, getting energy from food
S - MRSHGREN - ANSWERSSense, changes in the surroundings
H - MRSHGREN - ANSWERSHomeostasis, controlling their internal environment
G - MRSHGREN - ANSWERSgrowth, development
R - MRSHGREN - ANSWERSreproduction, producing offspring
E - MRSHGREN - ANSWERSexcretion, removing waste products
N - MRSHGREN - ANSWERSnutrition, needing of food
Test for glucose - ANSWERS1. Warm water bath
2. Benedict solution turns brick red
Test for Starch - ANSWERSiodine solution turns blue or black.
Definition of enzyme - ANSWERSBiological catalysts that control all the reaction in a cell
,What happens when the active site stops the enzyme working? - ANSWERSDenatures
What is Aerobic respiration? - ANSWERSRespire that requires oxygen
Equation for Aerobic respiration - ANSWERSGlucose + Oxygen = Carbon dioxide + Water +
Energy
What is Anaerobic respiration? - ANSWERSRespire that doesn't requires oxygen
Equation for Anaerobic respiration - ANSWERSGlucose = Ethanol + Carbon dioxide + some
energy
Test for carbon dioxide - ANSWERSbubbles in limewater, turns cloudy
Definition of diffusion - ANSWERSmovement of particles from an area of high concentration to
an area of lower concentration. It is caused by random movement of particles.
Definition of Osmosis - ANSWERSOnly water moves across a partially permeable membrane
from an area of high concentration to a low concentration
Definition of active transport - ANSWERSSubstances are moved against a concentration gradient
or across a selectively permeable membrane. Uses energy produced by cellular respiration
All specialized cells in order - ANSWERSOrganelles, cells, tissues, organs, organ systems
Features of Plants - ANSWERS- multicellular
- carry out photosynthesis
, Features of Animals - ANSWERS- Multicellular
- cannot carry out photosynthesis
Features of Fungi - ANSWERS- Can be multicellular or unicellular
- cannot carry out photosynthesis
Features of Protoctists - ANSWERS- Can be unicellular or multicellular
- can carry out photosynthesis
Features of Bacteria - ANSWERS- Single-celled organisms
- some can carry out photosynthesis
Trachea - ANSWERSTube with incomplete rings of cartilage carries air to lungs
bronchus - ANSWERScarries air to lung
bronchioles - ANSWERScarry air to lungs
alveoli - ANSWERStiny air sacs adapted for gaseous exchange
diaphragm - ANSWERSsheet of muscle with a fibrous middle part which is domed
ribs - ANSWERSbones that protect and ventilate lungs
internal intercostal muscles - ANSWERSpull ribs down and in
& Answers
M - MRSHGREN - ANSWERSmovement, for all or part of the organism
R - MRSHGREN - ANSWERSrespiration, getting energy from food
S - MRSHGREN - ANSWERSSense, changes in the surroundings
H - MRSHGREN - ANSWERSHomeostasis, controlling their internal environment
G - MRSHGREN - ANSWERSgrowth, development
R - MRSHGREN - ANSWERSreproduction, producing offspring
E - MRSHGREN - ANSWERSexcretion, removing waste products
N - MRSHGREN - ANSWERSnutrition, needing of food
Test for glucose - ANSWERS1. Warm water bath
2. Benedict solution turns brick red
Test for Starch - ANSWERSiodine solution turns blue or black.
Definition of enzyme - ANSWERSBiological catalysts that control all the reaction in a cell
,What happens when the active site stops the enzyme working? - ANSWERSDenatures
What is Aerobic respiration? - ANSWERSRespire that requires oxygen
Equation for Aerobic respiration - ANSWERSGlucose + Oxygen = Carbon dioxide + Water +
Energy
What is Anaerobic respiration? - ANSWERSRespire that doesn't requires oxygen
Equation for Anaerobic respiration - ANSWERSGlucose = Ethanol + Carbon dioxide + some
energy
Test for carbon dioxide - ANSWERSbubbles in limewater, turns cloudy
Definition of diffusion - ANSWERSmovement of particles from an area of high concentration to
an area of lower concentration. It is caused by random movement of particles.
Definition of Osmosis - ANSWERSOnly water moves across a partially permeable membrane
from an area of high concentration to a low concentration
Definition of active transport - ANSWERSSubstances are moved against a concentration gradient
or across a selectively permeable membrane. Uses energy produced by cellular respiration
All specialized cells in order - ANSWERSOrganelles, cells, tissues, organs, organ systems
Features of Plants - ANSWERS- multicellular
- carry out photosynthesis
, Features of Animals - ANSWERS- Multicellular
- cannot carry out photosynthesis
Features of Fungi - ANSWERS- Can be multicellular or unicellular
- cannot carry out photosynthesis
Features of Protoctists - ANSWERS- Can be unicellular or multicellular
- can carry out photosynthesis
Features of Bacteria - ANSWERS- Single-celled organisms
- some can carry out photosynthesis
Trachea - ANSWERSTube with incomplete rings of cartilage carries air to lungs
bronchus - ANSWERScarries air to lung
bronchioles - ANSWERScarry air to lungs
alveoli - ANSWERStiny air sacs adapted for gaseous exchange
diaphragm - ANSWERSsheet of muscle with a fibrous middle part which is domed
ribs - ANSWERSbones that protect and ventilate lungs
internal intercostal muscles - ANSWERSpull ribs down and in
