Free AQA GCSE Biology (8461) Exam Questions and Answers

HIV (Human Immunodeficiency Virus) is a pathogen. How is HIV spread from one person to another person? Tick (✓) one box.

• AA. Coughing
• BB. Sexual intercourse
• CC. Touching door handles

HIV (Human Immunodeficiency Virus) is a pathogen. Table 1 shows information about new cases of HIV diagnosed in the UK. Describe what happened to the number of new cases of HIV from 2010 to 2018.

Type your answer, then reveal.

HIV (Human Immunodeficiency Virus) is a pathogen. What could cause a decrease in the number of new HIV cases in the future? Tick (✓) one box.

• AA. A higher population of people in the UK
• BB. A lower number of trained HIV nurses
• CC. Better education on how to prevent the spread of HIV

HIV (Human Immunodeficiency Virus) is a pathogen. Scientists have been working to produce a vaccine for HIV for many years. How could a vaccine work to prevent a person being infected with HIV? Write the stages A, B, C, D and E in the correct order. The first stage has been completed for you. A Antibodies attach to the inactive virus. B Antibodies destroy the inactive virus. C An inactive form of the virus is injected into the body. D If the active virus enters the body, antibodies are produced quickly. E White blood cells produce antibodies to the inactive virus.

Type your answer, then reveal.

HIV (Human Immunodeficiency Virus) is a pathogen. When scientists produce a vaccine for a disease the vaccine is tested on live animals. What is the next stage in testing the vaccine? Tick (✓) one box.

• AA. Testing on cells in a laboratory
• BB. Testing on healthy volunteers
• CC. Testing on the whole human population

HIV (Human Immunodeficiency Virus) is a pathogen. A vaccine for HIV is important because it is difficult to develop safe drugs to destroy viruses. Why is it difficult to develop safe drugs to destroy viruses? Tick (✓) one box.

• AA. Drugs that destroy viruses also damage body tissues.
• BB. There are too many viruses for the drugs to destroy.
• CC. Viruses are too big for the drugs to destroy.

HIV (Human Immunodeficiency Virus) is a pathogen. Some drugs originated from plants. Draw one line from each drug to the plant the drug originated from. Drug: Aspirin, Digitalis Plant the drug originated from: Foxglove, Rose, Tobacco, Willow

Type your answer, then reveal.

Figure 1 shows animal cells. Some of the cells are dividing by mitosis for growth and repair. What fraction of the cells in Figure 1 is dividing by mitosis? Tick (✓) one box.

• AA. 1/8
• BB. 1/4
• CC. 1/2
• DD. 3/4

Figure 1 shows animal cells. Some of the cells are dividing by mitosis for growth and repair. The cells which are not dividing in Figure 1 each contain 10 chromosomes. One of these cells divides by mitosis to produce two new cells. How many chromosomes will each new cell contain after mitosis? Tick (✓) one box.

• AA. 5
• BB. 10
• CC. 15
• DD. 20

Figure 1 shows animal cells. Some of the cells are dividing by mitosis for growth and repair. Cells divide in a series of stages called the cell cycle. Complete the sentences. Choose answers from the box. contracts, divides, grows, reacts, relaxes, replicates Before mitosis occurs, the cell ____. The genetic material in the cell doubles when the DNA ____. After the chromosomes have been pulled to each end of the cell, the cytoplasm ____.

Type your answer, then reveal.