AQA Biology Paper 1 2022

Which of the following best describes meiosis?

• It is carried out in all tissues that require cell replacement. 
• It occurs only in cells in the reproductive structures of organisms. 
• It happens in all tissues except the brain and spinal cord
• It is the first stage of mitosis 

Mitosis and meiosis are processes involved in cellular reproduction. Which of the following describes an even that results from mitosis but not meiosis? 

• Two stages of cell division 
• Replication of cellular genetic material 
• Daughter cells that are identical to the parent cell
• Four daughter cells that are produced from each parent cell. 

Place these cells in order of mitosis.

• A, B, C, D, E
• B, E, D, A, C
• C, E, A, D, B
• B, D, A, E, C

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

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.

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 are human cardiac systems referred to as 'Double Circulatory Systems'?

• The heartrate can be doubled to pump more blood around the body when exercising.

• There are two 'dubs' (dub-dub) in one heart beat.

• The blood moves through the heart twice to be pressurized twice.

• Becasue there are two different kinds of blood vessels that are attached to the heart (arteries and veins).

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