Horizon International School
Biology Revision sheet
Name: …………………………………………..grade7 ___
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Q1- What are four things that cells can do to maintain homeostasis?
1 obtain and use energy
4 eliminate wastes
2 make new cells
3 exchange materials
Q2- Compare between active transport and passive transport.
Passive transport
Active transport
1 movement of particles from high
concentration to low concentration
1 movement of particles from low
concentration to high concentration
2 without using energy
2 by using energy
3 osomosis
difusion
3 exocytose
endocytosis
Q3- How are the starting materials and products of cellular respiration and photosynthesis
related?
1 both depend on the product of the other
1 6CO2 + 6H2O + light energy = C6H12O6 + 6O2
Q4- Write down the chemical equation of photosynthesis.
1 6CO2 + 6H2O + light energy = C6H12O6 + 6O2
Q5- Write down the chemical equation of cellular respiration?
1 C6H12O6 + 6O2 = 6CO2 + 6H2O + ATP
Q6- What are the stages of mitosis?
1 prophase
3 anaphase
2metaphase
4 telophase
Q7- Choose the correct answer
1. What is a reason that human skin cells frequently undergo mitosis?
A. to get energy for the body
B. to prevent bruises on the body
C. to replace dead or damaged skin cells
D. to replace dead or damaged muscle cells
2. Which of the following must all cells do to survive?
A. obtain energy
B. absorb wastes
C. utilize oxygen
D. continue growing
3. What does a tree do to maintain homeostasis during the winter months?
A. shivers
B. hibernates
C. absorbs sun
D. loses leaves
4.Homeostasis is necessary for a cell to survive. What is the definition of homeostasis?
A. the elimination of wastes
B. the division of cells to form new cells
C. the maintenance of a stable internal environment
D. the process by which energy from the sun is used to make food
5.How do organisms get the energy they need?
A. Plants get energy from fertilizers, and animals get energy by drinking water.
B. Plants get energy from glucose produced in the soil, and animals get energy directly from
sunlight.
C. Plants do not require energy because they do not move, and animals get energy by
performing exercise.
D. Plants break down the glucose they produced in photosynthesis, and animals get energy from
eating other organisms.
6. What products of photosynthesis are starting material for cellular
respiration?
A. glucose and oxygen
B. heat energy and ATP
C. carbon dioxide and water
D. light energy and chlorophyll
7. What is the food that plants produce during photosynthesis?
a. glucose
b. chlorophyll
c. chloroplasts
d. carbon dioxide
8. During which phase do chromosomes line up?
a. Prophase
b. metaphase
c. anaphase
d. telophase
9. In which phase does the cell's nuclear membrane break down?
a. Prophase
b. metaphase
c. anaphase
d. telophase
10. During which phase do chromosomes separate?
a. Prophase
b. metaphase
c. anaphase
d. telophase