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WorksheetsExam revision
Total questions: 20
Worksheet time: 10mins
Compare mechanical and chemical digestion.
Chemical digestion breaks food down into smaller pieces. Mechanical digestion breaks complex molecules into simpler substances.
Chemical and mechanical digestion both change complex foods into simpler substances.
Mechanical digestion breaks food down into smaller pieces. Chemical digestion breaks complex molecules into simpler substances.
Mechanical digestion only takes place in the mouth. Chemical digestion occurs in all other parts of the digestive system.
Name the part of the animal cell that controls the functioning of the cell.
ribosome
mitochondrion
cell membrane
nucleus
Name the part of a plant cell where a plant manufactures its food.
chloroplast
mitochondria
nucleus
cell wall
Identify which one of the following comparisons between plant and fungal cells is not correct.
both have a nucleus
both have a cell membrane
both contain chloroplasts
both have a cell wall
Mechanical digestion involves food particles being physically broken down into smaller particles.
For example, teeth mechanically digest food in the mouth, and the stomach churns food.
true
false
Chemical digestion involves complex food molecules being broken down into simpler molecules by digestive juices that contain enzymes.
For example, digestive enzymes in saliva break starch down to simple sugars and chemicals in the stomach break proteins down into simpler molecules (amino acids).
true
false
Name the type of animal cell that sends electrical messages around the body.
muscle cell
nerve cell
skin cell
blood cell
Select the list that shows the level of organisation from most complex to least complex.
organelle > cell > tissue > organ > organ system
cell > organ system > tissue > organelle > organ
organ system > organ > tissue > cell > organelle
tissue > organelle > organ > cell > organ system
A light microscope has an ocular lens with a magnification of ×4 and an objective lens with a magnification of ×10. Calculate the total magnification.
x14
x4
x40
x400
Animal cells do not have cell walls.
true
false
Animal cells do not have vacuoles.
true
false
A microscope has an eyepiece of magnification x10. What magnification must the lower lens have to produce an image with an overall magnification of x200?
x10
x20
x190
x200
Who was the person who first used the word ‘cell’ to name the microscopic cavities in cork?
Rudolph Virchow
Anton van Leeuwenhoek
Matthias Schleiden
Robert Hooke
Which of the following is a type of specialised plant cell?
Chloroform.
Fat.
Security.
Guard.
Which of the following statements concerning tiny organisms is correct?
Some organisms are made up of only one cell.
Even microscopic organisms contain a few hundred cells at least.
The only type of single-celled organism is the amoeba.
Single-celled organisms can only exist in other cells.
The Cell Theory states that: All living things, or organisms are made up of cells.
true
false
This specialised plant cell is known as a
root hair cell
xylem
phloem
root
Which of the following statements about red blood cells is incorrect?
they are able to flow easily through blood vessels
they carry oxygen from the lungs to the cells where it is needed.
they contain a nucleus
they are specialised cells
Which scientist made the first drawings of single-celled organisms (which he called ‘animalcules’)?
Robert Hooke
Anton van Leeuwenhoek
Rudolph Virchow
Theodor Schwann
Select the best shape for cells that are specialised to absorb water into an organism.
Small and cube-shaped so that they can fit tightly together.
Spherical so that when they are packed together there are many air spaces between them.
As big as possible so they can absorb a lot of water.
Possessing many long, thin extensions of the cell membrane.
