Marcus Lam
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Test yourself with B1. I recommend revising prior to doing this.

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Marcus Lam
Created by Marcus Lam over 7 years ago
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Core Biology Practice

Question 1 of 27

2

What are the main symptoms of Huntington's disease? Please tick each correct answer below.

Select one or more of the following:

  • Difficulty in breathing

  • Memory loss

  • High blood pressure

  • Weight loss

  • Clumsiness

Explanation

Question 2 of 27

1

We have 23 chromosomes in each nucleus of a cell

Select one of the following:

  • True
  • False

Explanation

Question 3 of 27

1

Fill the blank space to complete the text.

Huntington's disease and cystic fibrosis are examples of diseases

Explanation

Question 4 of 27

3

Select from the dropdown lists to complete the text.

Genes code for ( proteins, cells, DNA, nuclei ). There are two main types which are structural and functional. Structural is mainly used for cell ( management, life, growth, expansion ) and repair within organisms whereas functional are ( enzymes, acid, chemicals, catalysts ) which speed up the chemical reactions within the body.

Explanation

Question 5 of 27

1

We have genetic variation due to environmental factors. Tick two correct environmental factors below.

Select one or more of the following:

  • Eye colour

  • Injuries or scars

  • Dimples

  • Genetic diseases

  • Hair style

Explanation

Question 6 of 27

1

A phenotype is the characteristic you show.

Select one of the following:

  • True
  • False

Explanation

Question 7 of 27

3

Fill the blank spaces to complete the text.

The set of chromosomes determine the sex of the human. The person is female if the chromosomes are presented as and the person is male if the chromosomes are presented as

Explanation

Question 8 of 27

1

Fill the blank space to complete the text.

are different versions of a gene

Explanation

Question 9 of 27

2

Fill the blank spaces to complete the text.

When inheriting alleles, there are two main combinations of alleles. Inheriting two of the same alleles is called . Alternatively inheriting two different alleles is called .

Explanation

Question 10 of 27

2

Fill the blank spaces to complete the text.

A allele controls the development of a characteristic even if there is only one of that allele in a chromosome pair. A allele is present on both chromosomes in a pair as an alternative.

Explanation

Question 11 of 27

1

Horatio believes that he is at a high risk of heart disease. Which of these factors below could explain the reason for this? Please tick each correct answer.

Select one or more of the following:

  • Genetic disease

  • Poor diet

  • Lack of exercise

  • Smoking

  • Drugs/alcohol

Explanation

Question 12 of 27

1

What is the probability that a child has Huntington's disease if one of the parents is healthy and the other is a parent with the HD gene? You may wish to draw a punnet square to help find your answer.

Select one of the following:

  • 0%

  • 25%

  • 50%

  • 75%

  • 100%

Explanation

Question 13 of 27

2

What are the symptoms of Cystic Fibrosis? Please tick each correct answer below.

Select one or more of the following:

  • Weight loss

  • Weight gain

  • Chest infections

  • Difficulty breathing

Explanation

Question 14 of 27

1

The sex of the individual is determined by a gene on the X chromosome.

Select one of the following:

  • True
  • False

Explanation

Question 15 of 27

2

Fill the blank spaces to complete the text.

If the Y chromosome is not present i.e there are two XX chromosomes, the embryo will develop . Alternatively, if a Y chromosome is present then the embryo will develop .

Explanation

Question 16 of 27

3

Fill the blank spaces to complete the text.

stem cells are often classified as cells as they can develop into any type of cell. Stem cells can become during the developmental process of the embryo/organism.

Explanation

Question 17 of 27

1

Clones can be produced by asexual reproduction

Select one of the following:

  • True
  • False

Explanation

Question 18 of 27

1

Differences between clones are only genetic

Select one of the following:

  • True
  • False

Explanation

Question 19 of 27

1

For two non-identical twins, their genes are identical to their parents

Select one of the following:

  • True
  • False

Explanation

Question 20 of 27

2

What is it meant by pre-implantation genetic diagnosis? Please tick two correct answers.

Select one or more of the following:

  • IVF

  • Diagnosis for genetic diseases

  • Research from a donor

  • I don't know

  • Searching through a lot of embryos

Explanation

Question 21 of 27

1

Why might the authorities prevent the use of pre-implantation genetic diagnosis? Tick the BEST answer.

Select one of the following:

  • Its wrong

  • Its stupid

  • Its playing God

  • Its limited

  • Its unethical

Explanation

Question 22 of 27

2

Which two MOST important decisions that parents may have to make after having a genetic test?

Select one or more of the following:

  • Having a vaccination

  • Have the pregnancy terminated

  • The name of the baby

  • Have an anaesthetic during the birth of the baby

  • Have any more children

Explanation

Question 23 of 27

1

Steve is Mary's brother. What sex chromosome did they each receive from their mother?

Select one or more of the following:

  • Steve X, Mary X

  • Steve Y, Mary X

  • Steve X, Mary Y

  • Steve Y, Mary Y

Explanation

Question 24 of 27

1

False negative is when the foetus does not have the disorder as the outcome but does have the disorder in reality

Select one of the following:

  • True
  • False

Explanation

Question 25 of 27

1

False positives are where the foetus has not got the disorder as the test outcome, but does have the disorder in reality

Select one of the following:

  • True
  • False

Explanation

Question 26 of 27

1

What is the probability that a conceived child has Cystic Fibrosis if both parents are carriers? You may wish to draw a punnet square to help you in answering this question.

Select one or more of the following:

  • 0%

  • 25%

  • 50%

  • 75%

  • 100%

Explanation

Question 27 of 27

1

To be a carrier of Cystic Fibrosis, you only need one healthy allele and one allele that has CF

Select one of the following:

  • True
  • False

Explanation

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