MCQ

CH9 - GAS EXCHANGE AND SMOKING

In the lungs, movement of dissolved carbon dioxide out of the capillaries occurs in one of two ways:• by diffusion through the endothelial cells of ...

2024 Summer

3

MCQ

CH9 - GAS EXCHANGE AND SMOKING

How are alveoli adapted to their function?

2024 Summer

4

MCQ

CH9 - GAS EXCHANGE AND SMOKING

What maintains the steep concentration gradients needed for successful gas exchange in the lungs?1. Air flow in the alveoli is in the opposite directi...

2024 Summer

3

MCQ

CH9 - GAS EXCHANGE AND SMOKING

The diagram shows oxygen diffusing from the space inside an alveolus into the blood through the gaseous exchange surface.What would increase the rate ...

2024 Summer

6

MCQ

CH9 - GAS EXCHANGE AND SMOKING

Where is cartilage tissue always found in the human gas exchange system?

2024 Summer

4

MCQ

CH9 - GAS EXCHANGE AND SMOKING

Which tissues are present in a bronchus? [Table_1]

2024 Summer

5

MCQ

CH9 - GAS EXCHANGE AND SMOKING

Scientists compared the density of goblet cells in the lungs and the density of mucus in the lungs of three groups of people: • people who do not s...

2024 Summer

3

MCQ

CH9 - GAS EXCHANGE AND SMOKING

Steep concentration gradients must be maintained for efficient gaseous exchange to occur in the human lungs. Which row correctly describes how steep ...

2024 Summer

7

MCQ

CH9 - GAS EXCHANGE AND SMOKING

What is the function of cilia in the gas exchange system?

2024 Winter

4

MCQ

CH9 - GAS EXCHANGE AND SMOKING

Which tissues are present in the walls of a trachea and an alveolus? [Table_1: tissue table with epithelium with goblet cells and smooth muscle prese...

2024 Winter

4

MCQ

CH1 - CELL STRUCTURE

The actual length of a cell structure is 8 µm. Which steps are used to calculate the magnification of an electron micrograph of this cell structure?...

2019 Summer

5

MCQ

CH1 - CELL STRUCTURE

What is the typical resolution of a microscope using daylight as a light source with a ×10 eyepiece lens and a ×40 objective lens?

2019 Summer

3

MCQ

CH1 - CELL STRUCTURE

Two different types of cell, P and Q, were broken up using ultrasound and their contents analysed. Both types of cell contained small circular DNA. Th...

2019 Summer

4

MCQ

CH1 - CELL STRUCTURE

Which features shown in the diagram can be present in viruses?

2019 Summer

3

MCQ

CH2 - BIOLOGICAL MOLECULES

After boiling a sample of milk with Benedict’s solution, a yellow colour is observed. Which conclusion about the sample of milk is correct?

2019 Summer

3

MCQ

CH2 - BIOLOGICAL MOLECULES

Which of the statements about polysaccharides can be used to describe amylose and cellulose?1. contains 1,4 glycosidic bonds2. contains 1,6 glycosidic...

2019 Summer

3

MCQ

CH2 - BIOLOGICAL MOLECULES

Which diagram shows the formation of a peptide bond?

2019 Summer

3

MCQ

CH3 - ENZYMES

In enzyme-catalysed reactions, the position of the amino acids found at the active site is important. During the synthesis of enzymes, amino acids are...

2019 Summer

3

MCQ

CH2 - BIOLOGICAL MOLECULES

Which features affect the tensile strength of collagen?1 the helical structure of collagen chains2 the small R group of the amino acids in collagen3 t...

2019 Summer

3

MCQ

CH3 - ENZYMES

A fixed volume of the enzyme catalase was added to a fixed volume of hydrogen peroxide solution. The diagram shows how the concentration of product ch...

2019 Summer

3