What conditions do enzymes depend on?

temperature, ph of surroundings

The rate of diffusion is affected by:

Difference in Concentration, temperature and surface area

What has been your favourite topic in biology this year?

Cells, Diversity of life, Gas exchange, Enzymes and digestion

What are the requirements for a balanced diet?

A diet with correctly balanced nutrients

The function of the DIGESTIVE SYSTEM is to...

Break down our food so that we can absorb the nutrients

Which of the following statements is true of villi?

Lacteals absorb glycerol and fatty acids.

What is the pathway of air to the lungs?

Nasal cavity, Pharynx, Larynx, Trachea,

What do chemicals in inhaled smoke do to the cilia in the trachea and what is the result of this?

Paralyses cilia leading to increased infections

the smallest structural and functional unit of an organism

What is the function of enzymes?

They speed up chemical reactions

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Year 9 Biology Revision @ NWC

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Questions 21

Answers

1
What conditions do enzymes depend on?
temperature, ph of surroundings
ph of surrounding, shape
temperature, shape
temperature, how many enzymes
2
The rate of diffusion is affected by:
Cell walls, water availability
Osmosis, active transport and temperature
Solubility of substance, cytoplasm contents.
Difference in Concentration, temperature and surface area
3
When the lungs are empty, the diaphragm ___
Contracts
Relaxes
4
What has been your favourite topic in biology this year?
Cells
Diversity of life
Gas exchange
Enzymes and digestion
5
Villi are found primarily in the
appendix
large intestine
stomach
small intestine
6
A membrane around the lungs
Pleura
Bronchi
Bursai
Epiglottis
7
What disease has to do with the digestive system?
Gastroenteritis
Crohn’s disease
Celiac disease
All of the above
8
Active transport...
requires energy
is limited to only things leaving the cell
is limited to only things leaving the cell
includes diffusion
9
What are the requirements for a balanced diet?
A diet that is fed 3 times a day
A diet that helps animals lose weight
A diet that helps animals gain weight
A diet with correctly balanced nutrients
10
The function of the DIGESTIVE SYSTEM is to...
Break down our food so that we can absorb the nutrients
Produce faeces
Get oxygen into the blood
Get blood to and from the cells of our body
11
Which of the following statements is true of villi?
Lacteals absorb glucose and amino acids.
Blood capillaries absorb glucose and fatty acids.
Blood capillaries absorb glycerol and amino acids.
Lacteals absorb glycerol and fatty acids.
12
What is the pathway of air to the lungs?
Mouth, Larynx, Pharynx, Trachea
Nasal cavity, Larynx, Trachea, Pharynx
Nasal cavity, Pharynx, Larynx, Trachea,
Nasal cavity, Pharynx, Trachea, Larynx
13
How many kingdoms of life exist?
4
5
2
3
14
A student has two cups he can use to make a calorimeter. Which should he use? Why?
B:The reaction can be seen from the side to avoid fumes
A:It is a better insulator
B:It is harder to puncture with a thermometer
A:You can use a new one with each reaction
15
MRSGREN - what does M stand for?
making
mating
mouth
movement
16
What do chemicals in inhaled smoke do to the cilia in the trachea and what is the result of this?
Makes the cilia hyperactive causing you to cough
Cilia block the mucus producing goblet cells leading to infections
Cilia get longer tickling the throat causing you to cough
Paralyses cilia leading to increased infections
17
What is a cell?
a device used to call
a jelly like substance
a type of plant
the smallest structural and functional unit of an organism
18
Which type of cell has a nucleus?
Eukaryotic
Prokaryotic
19
Which substance is not absorbed by the villi
Glycerol
Amino acids
Simple sugars
Proteins
20
What is the function of enzymes?
Enzymes destroy disease
They alter heart rate
They speed up chemical reactions
They slow down energy production
21
Which organelles are present in a plant cell, but not in an animal cell?
Cell Membrane and Chlorolplasts
Cell Wall and Cell Membrane
Heart and Lungs
Chloroplast and Cell Wall

Year 9 Biology Revision @ NWC Flashcards | StudBud