HSC Biology

Question 1

How many chromosomes do human cells have?

Accepted Answer

46 (Diploid)

Question 2

Allowing pressure on either side of the ear drum to be equalised is who's job?

Accepted Answer

Eustachian Tube

Question 3

Define meiosis.

Accepted Answer

The process in which halves the number of chromosomes

Question 4

What is represented by this family tree?

Accepted Answer

Inheritance of a recessive trait

Question 5

Look at the picture. How many independent variables were in the first-hand investigation?

Accepted Answer

2

Question 6

What are you commenting on when you talk about the repetition of an experiment?

Accepted Answer

Reliability

Question 7

Which is known as an active transport?

Accepted Answer

Both reabsorption and secretion

Question 8

What specific process is shown in the diagram?

Accepted Answer

Stimulation of a B cell to become a plasma cell

Question 9

Which structure of the plant carries water and through what transport?

Accepted Answer

Xylem, Passive

Question 10

Identify an adaptation for plants when there is not much sun around.

Accepted Answer

Broad leaves

Question 11

Why do co-dominant alleles NOT produce simple Mendelian ratios?

Accepted Answer

Both alleles are expressed in the phenotype

Question 12

How do vaccinations prevent disease?

Accepted Answer

Increase number of antibodies against the pathogen

Question 13

Which of the following does NOT play a role in maintaining the health of an organism?

Accepted Answer

Sexual Reproduction

Question 14

What type of energy happens at the tympanic membrane and how?

Accepted Answer

Kinetic by mechanical vibrations

Question 15

Which is in the correct order of urine formation?

Accepted Answer

Filtration -> Reabsorption -> Secretion

Question 16

Which of the following best describes 'metabolism'?

Accepted Answer

All the chemical reactions inside cells of an organism

Question 17

When B cells are activated they divide to form a large number of antibody-secreting cells. How?

Accepted Answer

Mitosis & cell specialisation produce cells, maintain health

Question 18

What would be the best explanation for a chicken with both black and white spots?

Accepted Answer

Co-dominance

Question 19

What is NOT a difference between DNA and RNA?

Accepted Answer

Only DNA is included in protein synthesis

Question 20

What is the function of the Organ of Corgi?

Accepted Answer

Electrical signal is triggered

Question 21

What are the outcomes of the process 'meiosis'?

Accepted Answer

Haploid gametes

Question 22

Outline the process where one species pans out into different environments and looks different

Accepted Answer

Divergent evolution

Question 23

Which of the following are forms of defence that prevent the entry of pathogens into the body?

Accepted Answer

Cilia, sweat, saliva

Question 24

Which of the following scientists proposed the chromosomal theory of inheritance?

Accepted Answer

Walter Sutton

Question 25

Which is correct for RNA?

Accepted Answer

Uracil attaches to Adenine

Question 26

Hormone replacement therapy treated a patient who had low salt levels. Which hormone was used?

Accepted Answer

Aldosterone

Question 27

Why is it important to continue research into new antibiotics?

Accepted Answer

Resistant bacteria have evolved from overuse of antibiotics

Question 28

The formation of mRNA from a strand of DNA is known as?

Accepted Answer

Transcription

Question 29

What's the name of the process that results in organisms containing DNA from different species?

Accepted Answer

Transgenics

Question 30

Which is not a chemical that is filtered out of the blood by the kidney?

Accepted Answer

Blood cells

Question 31

Why do organ transplants trigger an immune response in a recipient?

Accepted Answer

Recipients leukocytes recognise antigens on organ as foreign

Question 32

How does sound travel?

Accepted Answer

Through vibrations in a medium

HSC Biology

Questions 32

HSC Biology

Questions 32