WorksheetsBiology Paper 1 Revision
Total questions: 46
Worksheet time: 25mins
Which part of the digestive system had a low pH to help the enzymes with low optimum pH level
Mouth
Large Intesine
Small Intestine
Stomach
Which one of these statements about enzymes isn't true.
The active site on the enzyme has a specfic shape to only fit one substrate.
When the temperature around the enzyme is above it's optimum temperature, the enzyme will start to denature.
Enzymes can speed up reactions. Examples can be breaking down molecules, or putting molecules together.
When a enzyme is in a pH that is not in it's optimum pH range, it will die.
Denaturing is when the enzyme, and it's active site, change shape.
Protease breaks down (a) molecules.
Lipase breaks down (a) molecules.
Amylase breaks down (a) molecules.
What does Bile do in digestion?
Protects the cells in the stomach lining from the acid inside it.
Allows the lock and key model of the enzymes to work more efficently.
Creates better conditions for good bacteria to grow in digestive system.
Emulsifise (break down) fats.
Bile is made in the ______ and released from the_____.
Liver, Gall Bladder
Kidneys, Small Intestine
Pancrease, Stomach
Saliva Glands, Mouth
The reagents for testing for the following food; Fats, Sugars, Proteins, Starch
Ethanol, Benedict's, Biuret, Iodine
Benedict's, Biuret, Iodine, Ethanol
Biuret, Iodine, Benedict's, Ethanol
Iodine, Benedict's, Ethanol, Biuret
The Valves in the heart and veins prevent ________.
Forward Flow
Cardiac Flow
Lateral Flow
Back Flow
Why do arteries have very thick and elastic walls.
The protect the blood inside.
To prevent coronary heart disease,
So substance like oxygen can't move through the walls.
To withstand the large amount of pressure in the blood they carry.
What treatment for Coronary Heart Disease does this picture show?
Stent
Statin
Heart Transplant
By-Pass
Algae can photosynthesise.
Complete the word equation for photosynthesis.
water + ______1._________ --------> ________2._______ + oxygen
1 Carbon Dioxide
1 Glucose
2 Carbon Dioxide
2 Glucose
What is the tiny openings that let in the carbon dioxide needed for photosynthesis?
stomata
xylem
phloem
chloroplast
The goal of mitosis is to
make a new parent cell
make two new daughter cells with the same DNA
make two new daughter cells with different DNA
to grow a larger toe
Cells in plant roots do not photosynthesise.
Give one reason why.
They do not have any oxygen
They do not have any carbon dioxide
They do not have any light for photoynthesis
The do not have any glucose for energy
The graph shows the effect of the concentration of carbon dioxide on the rate of photosynthesis in tomato plants at 20 °C.
Question
What is the maximum rate of photosynthesis of the tomato plants shown in the graph?
(a)
A farmer plans to grow tomatoes in a large greenhouse.
The concentration of carbon dioxide in the atmosphere is 0.04%. The farmer adds carbon dioxide to the greenhouse so that its concentration is 0.08%.
Question
(i) Why does the farmer use 0.08% carbon dioxide?
To increase the rate of growth of the tomato plants
To increase the rate of respiration of the tomato plants
To increase water uptake by the tomato plants
How does water travel from the roots to the plan leaf? Name the structure that carries water.
stomata
phloem
chloroplast
xylem
Which is true about active transport?
requires energy
does not require energy
moves substances down the concentration gradient
moves material from high to low concentration
Antigen
Protein released by lymphocytes that immobilises pathogens
Chemical released by lymphocytes that neutralises toxins
Chemical marker on the surface of cells
Type of medicine prescribe for bacterial infections
Antibody
Protein released by lymphocytes that immobilises pathogens
Chemical released by lymphocytes that neutralises toxins
Chemical marker on the surface of cells
Type of medicine prescribe for bacterial infections
Pathogen
A type of micro-organism that invades the body
A type of micro-organism that can only survive within the body
A type of micro-organism that causes no harm
A type of micro-organism that causes a diseases
Vector
An organism that transfers a pathogen from one organism to another
Insects
An organism that causes a communicable disease
Which pathogen is treated with antibiotics?
virus
bacteria
parasite
fungi
What is a first line defense?
Barries within our body which form the immune system.
When the pathogens gets through the external defenses, and the body's response leads to healing
The response from our body when a pathogen gets inside our body.
Physical and chemical barriers which prevent disease-causing pathogens enter your body.
An example of a first line defense are the immune cells.
Veins carry blood ________
from the body to the heart
from the heart to the body
veins don't carry blood
Arteries carry blood ______
from the heart to the body
from the body to the heart
from the brain to the heart
In the image below, what is A?
(a)
In the image below, what is B?
(a)
