Revision_Grade9_Biology

REVISION

Grade 9 2020.11.30

Multiple Choice

Choose the correct order below. (small to big)

• atom, molecule, organelle, tissue, cell

• organism, organ, cell, tissue

• cell, tissue, organ, organ system, organism

• atom, organelle, organ, organism

Multiple Choice

 Starch and water molecules in potato cells are stored in what organelle?

• mitochondria
• nucleus
• cell wall
• vacuole

Multiple Choice

What is the function of a cell wall?

• to protect and support the cell
• to perform different functions in each cell
• to prevent water from passing through it
• to prevent oxygen from entering the cell

Multiple Choice

All cells need energy to function.  Which cell organelle is responsible for producing energy in the cell?

• chloroplasts
• mitochondria
• nucleus
• vacuoles

Multiple Choice

Chloroplasts in plant cells allow the plant to perform a function that animal cells cannot do.  What is the main function of the chloroplasts found in plant cells?

• to absorb light energy and manufacture food
• to remove waste materials by active transport
• to manufacture chemical energy from food
• to control the shape of the cell

Multiple Choice

What is the function of the cell nucleus found in both plant and animal cells?

• to produce energy
• to control cell activity
• to remove waste products
• to allow molecules to enter the cell

Multiple Choice

Which cell structure is found in plant and animals cells and controls what can come into or leave a cell?

• cell membrane
• cytoplasm
• nucleus
• vacuole

Multiple Choice

Which structures are found in every living cell?

• cell membrane and cytoplasm
• chloroplasts and mitochondria
• a cell wall and nucleus
• chloroplasts and cell wall

Multiple Choice

Which of the following are NOT found in animal cells

• chloroplasts and cytoplasm
• chloroplasts and cell wall
• cell wall and cell membrane
• mitochondria and nucleus

Multiple Choice

Active transport requires ______, moves materials from __________________, and goes _______ the concentration gradient.

• No energy, low to high, against
• ATP, high to low, with
• ATP, low to high, with
• ATP, low to high, against

Multiple Choice

The movement of molecules from higher concentration to lower concentration is

• diffusion

• cell division

  active transport

• active transport

• tonicity

Multiple Choice

What is the definition of Osmosis?

• the passive movement of WATER molecules from a high to low concentration across the cell membrane.

• the state where molecules are equally concentrated (balanced) on both sides of the cell membrane.

• the process that brings LARGE particles INTO the cell through the cell membrane

• he movement of molecules across the cell membrane that REQUIRES ENERGY output from the cell

Multiple Choice

The picture below is an example of _________________.

• osmosis
• isotonic
• diffusion
• active transport

Multiple Choice

Osmosis is the movement of _____ across a membrane.

• food
• energy
• oxygen
• water

The chemicals of life

Grade 9

Biological molecules

• Carbohydrates: made from Carbon, Hydrogen and Oxygen (CHO)

• Fats and oils: made from Carbon, Hydrogen and Oxygen (CHO)

• Proteins: made from Carbon, Hydrogen, Oxygen, Nitrogen and sometimes Sulfur (CHON[S])

Multiple Choice

Which colour confirms little reducing sugars when a food substance with Benedict's solution is heated?

• Red

• Green

• Blue

• Orange

Multiple Choice

Which reagent is used to test for Reducing sugars in the laboratory?

• benedict's solution

• Benedict's solution

• Benedicts solution

• Benedicts' solution

Multiple Choice

Starch is a ___________ because it is made of many sugars sub units

• monosaccarhides 
• Disaccarhides
• Polysaccharides
• Protein 

Multiple Choice

A(n) _______________ is a protein that speeds up that rate of a chemical reaction.

• Muscle 
• Ketone
• Alpha helix
• Enzyme 

Multiple Choice

Proteins are made up of long chains of ________________.

• Amino Acids
• Lipids
• Saccharides
• Polysaccharides 

Multiple Choice

A monomer unit that makes up lipids is __________________ and _____________.

• Saccharides, nucleotides
• Amino acids, glycerol
• Glycerol, saccharides
• Fatty acids, glycerol 

Multiple Choice

A function of a lipid is________________.

• Short term energy
• Energy storage
• Structures and enzymes
• Hereditary information 

Multiple Choice

List four chemical elements that are found in proteins.

• Oxygen, Carbon, Nitrogen and Hydrogen

• Carbon, Phosphorus, Hydrogen and Nitrogen

• Carbon, Oxygen, Nitrogen and Phosphorus

• Oxygen, Carbon, Phosphorus, Hydrogen

Multiple Choice

A student set up a test-tube containing starch, water and amylase. How could the student test whether the amylase had digested all the starch?

• Add Biuret solution.

• Add dilute hydrochloric acid.

• Add iodine solution.

• Weigh the test-tubes and contents before and after the experiment.

Multiple Choice

Which food-testing reagent shows a positive result when it turns from blue to purple?

• Benedict’s solution

• biuret reagent

• ethanol

• iodine solution