IGCSE Biology Paper 2: Multiple Choice

Which biological process directly provides the raw materials necessary for an organism to repair damaged tissues?

What taxonomic rank is assigned to a group of organisms capable of interbreeding and producing viable, fertile offspring?

A plant root hair cell differs from a human sperm cell in that the root hair cell contains which of the following?

In a cross-section of a leaf, which specific cell type is primarily responsible for carrying out the majority of photosynthesis?

Which of the following processes require oxygen? 1. Glucose uptake in the small intestine. 2. Nitrate uptake in root hair cells. 3. Water movement in mesophyll cells.

A plant cell is placed in solutions of varying concentrations, resulting in the turgor pressure changes shown on the graph. What is the condition of the cell at point X?

Using the DNA structure illustrated, determine the sequence of bases on the unlabelled strand, reading from top to bottom.

Amylase and pepsin are both digestive enzymes, but they have different active site shapes. What is the primary reason for this difference?

The rate of an enzyme-controlled reaction slows down when the temperature is below the optimum. Which of the following explains why? 1. Enzyme denaturation. 2. Reduced kinetic energy. 3. Substrate shape change 4. Less frequent molecular collisions.

Which statement accurately describes an enzyme-catalysed reaction?

Four test-tubes with plant leaves are placed in a water bath at 20°C for two hours. Under which test conditions would the hydrogencarbonate indicator turn yellow?

From which source does a plant obtain mineral ions?

The graph shows maltose concentration in the alimentary canal. What explains the change in maltose concentration at point X?

In a newly germinated bean seedling, which part of the plant absorbs the greatest amount of water?

Scientists remove a ring of tissue from a plant stem, including the transport vessels. A few days later, swelling is observed above the removed area. What causes this swelling?

Which is a coronary artery? (Refer to diagram)

When blood moves from the atria to the ventricles in the heart, what actions occur?

Campylobacter is a bacterium that causes food poisoning. What term best describes Campylobacter?

What percentage of oxygen is typically found in exhaled air?

Which of the following accurately identifies the processes that all require energy from respiration?

What is the correct word equation for anaerobic respiration in yeast?

Which of the following substances are generally excreted by the human body? 1. Carbon dioxide 2. Urea 3. Water

How does the body respond to a decrease in blood glucose concentration?

Which labeled structure plays a role in regulating the amount of light that enters the eye?