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Biology A Level Module 24-25

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Questions and Answers

Which of the following processes would be directly affected by a decrease in the surface area of the small intestine?

Absorption of lipids (correct)

Absorption of water

Digestion of proteins

Digestion of carbohydrates

A student is investigating the rate of diffusion of a substance through an agar block. Which of the following variables would NOT affect the rate of diffusion?

The concentration gradient of the substance

The temperature of the agar block

The color of the substance (correct)

The size of the agar block

Which of the following describes the role of the alveoli in gas exchange?

They provide a large surface area for gas exchange. (correct)

They are the site of oxygen production through photosynthesis.

They transport oxygenated blood to the heart.

They filter air to remove dust and pathogens.

Which of the following is NOT a mechanism that insects use to maximize gas exchange?

<p>Moist respiratory surfaces for increased diffusion (C)</p> Signup and view all the answers

Which of the following is a likely consequence of lung diseases on gas exchange?

<p>Decreased oxygen levels in the blood (B)</p> Signup and view all the answers

Flashcards

Size and surface area

The relationship between an object's size and its surface area affects its functions, especially in biological processes like diffusion.

Digestion of carbohydrates

The process of breaking down carbohydrates into simpler sugars for absorption in the digestive system.

Absorption of proteins

The process where digested proteins are taken up by the body, mainly occurring in the small intestine.

Gas exchange in humans

The process where oxygen is taken in and carbon dioxide is expelled in the lungs.

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Effect of lung diseases

Lung diseases can impair gas exchange, leading to difficulty breathing and reduced oxygen intake.

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Study Notes

Topic: Biology A Level

Module 24-25: Full A level bio topics.
3.3.1: Size and surface area.
3.3.3 & 3.2.3: Digestion and absorption of carbohydrates, proteins, and lipids. Practical activity is highlighted with the use of agar blocks.
3.3.2: Gas exchange in fish and insects, and gas exchange in humans.
3.3.2: Effect of lung diseases, and possible project-based investigation.
Carousel of dissection: Focus on lungs, gills, and locusts.
Revision and consolidation: This section covers review and solidifying learning from previous topics.

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Description

Test your knowledge on crucial A Level Biology topics including size and surface area, digestion, gas exchange in various organisms, and effects of lung diseases. This quiz also covers practical activities like agar block experiments and dissection methods. Solidify your understanding with revision questions based on previous modules.