Leah Firmstone
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GCSE Biology (B7 - Further Biology) Quiz on B7 Quiz - New Technologies, created by Leah Firmstone on 06/19/2016.

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Leah Firmstone
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B7 Quiz - New Technologies

Question 1 of 13

1

Why use microbes?

Select one or more of the following:

  • They have a simple biodiversity and so are easy to understand and control

  • They reproduce quickly

  • There are only a few different species

  • They can be genetically engineered to change their products

  • There is no ethical concerns about their treatment

  • They die quickly

Explanation

Question 2 of 13

1

In genetic modification (GM), a gene is transferred from one organism to another, where it continues to work.

Select one of the following:

  • True
  • False

Explanation

Question 3 of 13

1

Put the following statements in order:
1.The gene is then inserted into a suitable vector (eg a plasmid or virus).
2.The required gene is identified and isolated (cut out of the organism’s DNA using enzymes).
3.The vector is used to insert the gene into the host organism (eg bacteria or yeast).
4.Organisms that have been successfully modified are selected and then ‘cultured’ (grown in ideal conditions to increase their numbers).
5.The gene is then replicated to make many copies of it.

Select one of the following:

  • 2,5,1,3,4

  • 5,2,1,3,4

  • 4,2,3,1,5

  • 2,3,5,4,1

Explanation

Question 4 of 13

1

Genetic can be used to make crops to disease, which means that fewer pesticides need to be sprayed onto farmland. Other crops can be made resistant to , so that the field can then be sprayed with a herbicide to kill off all the , making the crop more and easier to harvest.

Drag and drop to complete the text.

    modification
    resistant
    harmful
    herbicides
    weeds
    successful

Explanation

Question 5 of 13

1

Genetic modification can also be used to manufacture human proteins which are used to treat medical conditions.

Select one of the following:

  • True
  • False

Explanation

Question 6 of 13

1

Fill the blank spaces to complete the text.

means manipulating and using particles of materials that are very small - between 1 and nm – about the size of some molecules.
Nanotechnology can be used in packaging. For example, silver nanoparticles are anti-microbial and can be used to prevent bacteria from growing inside food packaging. This extends the life of the food. It can also be used in medicines, for example nanoparticles can speed up the healing process and gold plated 'nano ' act as a concentrated treatment for by absorbing energy and then heating and killing the tumour.

Explanation

Question 7 of 13

1

Stem cells are...

Select one of the following:

  • ... cells that can develop into any type of cell

  • ... found in the stems of plants

  • ... the most common type of cell in the human body

Explanation

Question 8 of 13

1

Choose the examples of stem cell sources.

Select one or more of the following:

  • xylem

  • embryos

  • meristems

  • amniotic fluid

  • bone marrow

  • umbilical cord

  • phloem

Explanation

Question 9 of 13

1

Stem cells can be cultured outside the body.

Select one of the following:

  • True
  • False

Explanation

Question 10 of 13

1

Biomedical engineering involves...

Select one of the following:

  • ...solving medical problems using new materials and man-made parts

  • ...experimenting genetically on living organisms

  • ...developing and improving existing medical knowledge with the use of plants

Explanation

Question 11 of 13

1

Examples of biomedical engineering include:

Select one or more of the following:

  • artificial pacemakers

  • mechanical or biological heart valve replacements

  • organ transplants

  • stem cell development

  • using the genetic modification of bacteria to produce human insulin

Explanation

Question 12 of 13

1

Which of the following apply to mechanical heart valves?

Select one or more of the following:

  • likely to last for longer

  • need to be replaced quicker

  • more likely to be rejected by the body

  • easier operation

Explanation

Question 13 of 13

1

Genetic testing may be used to find out if an has a genetic disease - a disease which they have and which is a result of a defect in their DNA.
To investigate a person’s DNA, blood cells are used because they are easy to obtain from a blood sample, and (unlike blood cells) they have a nucleus containing the DNA.

1. Isolation of DNA from white blood cells
A small quantity of blood has chemicals added to it. The chemicals split open the red cells. The sample is then put into a centrifuge and spun very rapidly so that the white cells form a at the bottom of the tube.
The pellet of white blood cells is then in a liquid. More chemicals are added which split open the cell membranes and release the DNA from the .
The DNA is collected and then (more copies of it are made) so that there is enough to test. The DNA is then broken up into smaller sections using and put onto a special gel. An electrical is applied, and the pieces of DNA separate out along the gel.
2. Gene Probe
A gene is a short section of single-stranded DNA that has a chemical attached to it which will glow under UV light. The chemical is added to a length of DNA which has the base sequence to the gene that codes for a particular disease, eg cystic fibrosis.
3. Adding the gene probe to the sample DNA
The separated pieces of DNA on the gel are ‘blotted’ to split the DNA into single strands. The gene probe is added and if the gene the scientist is searching for is present, the gene probe will to it because it has a complementary base sequence to the gene being .
4. Using UV light
The gel is then viewed under light. If the gene is present, the gel will glow at that point. The gene has therefore been identified as being in the person’s DNA.

Drag and drop to complete the text.

    individual
    inherited
    white
    red
    pellet
    suspended
    nucleus
    replicated
    enzymes
    current
    probe
    fluorescent
    complementary
    bind
    investigated
    UV
    present

Explanation

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