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

Which statements about resolution and magnification are correct?[Table_1]

2018 Summer

3

MCQ

CH1 - CELL STRUCTURE

An eyepiece graticule has a scale with 100 divisions. A stage micrometer has a scale with 50 divisions, each of which is 0.040 mm apart. Using a ×40 ...

2018 Summer

3

MCQ

CH1 - CELL STRUCTURE

A prokaryotic cell which is 1 µm in diameter, is magnified 50000 times in an electron micrograph. What is the diameter of the cell in the electron m...

2018 Summer

3

MCQ

CH1 - CELL STRUCTURE

A scientist carried out an experiment to separate cell structures in animal cells. The cells were broken open to release the cell structures. This ext...

2018 Summer

2

MCQ

CH1 - CELL STRUCTURE

Radioactively-labelled nucleotides are introduced into a cell.In which cell structures will the radioactivity first become concentrated?

2018 Summer

2

MCQ

CH2 - BIOLOGICAL MOLECULES

What is the general formula for amylose?

2018 Summer

3

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagram shows relationships between some important molecules and bonds. What is represented by circles numbered 1, 2 and 3?

2018 Summer

2

MCQ

CH2 - BIOLOGICAL MOLECULES

In unsaturated lipid molecules, where are double bonds located?

2018 Summer

3

MCQ

CH2 - BIOLOGICAL MOLECULES

Phospholipids and triglycerides are important biological molecules.Which properties are correct for these molecules?[Table_1]

2018 Summer

3

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagrams show two arrangements of amino acids in a protein. Which row correctly names the bonds at S or T?

2018 Summer

3