Test
B7 Quiz - New Technologies
Este test tiene tipos de pregunta que se abren en el reproductor de siempre.
Preguntas del test (13)
1Why use microbes?
- AThey have a simple biodiversity and so are easy to understand and control
- BThey reproduce quickly
- CThere are only a few different species
- DThey can be genetically engineered to change their products
- EThere is no ethical concerns about their treatment
- FThey die quickly
2In genetic modification (GM), a gene is transferred from one organism to another, where it continues to work.
- AVerdadero
- BFalso
3Put 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.- A2,5,1,3,4
- B5,2,1,3,4
- C4,2,3,1,5
- D2,3,5,4,1
4Genetic [blank_start]modification[blank_end] can be used to make crops [blank_start]resistant[blank_end] to disease, which means that fewer [blank_start]harmful[blank_end] pesticides need to be sprayed onto farmland. Other crops can be made resistant to [blank_start]herbicides[blank_end], so that the field can then be sprayed with a herbicide to kill off all the [blank_start]weeds[blank_end], making the crop more [blank_start]successful[blank_end] and easier to harvest.
- Amodification
- Bresistant
- Charmful
- Dherbicides
- Eweeds
- Fsuccessful
5Genetic modification can also be used to manufacture human proteins which are used to treat medical conditions.
- AVerdadero
- BFalso
6[blank_start]Nanotechnology[blank_end] means manipulating and using particles of materials that are very small - between 1 and [blank_start]100[blank_end]nm – about the size of some molecules.
Nanotechnology can be used in [blank_start]food[blank_end] packaging. For example, silver nanoparticles are anti-microbial and can be used to prevent [blank_start]harmful[blank_end] bacteria from growing inside food packaging. This extends the [blank_start]shelf[blank_end] life of the food. It can also be used in medicines, for example [blank_start]silver[blank_end] nanoparticles can speed up the healing process and gold plated 'nano [blank_start]bullets[blank_end]' act as a concentrated treatment for [blank_start]cancer[blank_end] by absorbing energy and then heating and killing the tumour.- A100
- BNanotechnology
- Cfood
- Dharmful
- Eshelf
- Fsilver
- Gbullets
- Hcancer
7Stem cells are...
- A... cells that can develop into any type of cell
- B... found in the stems of plants
- C... the most common type of cell in the human body
8Choose the examples of stem cell sources.
- Axylem
- Bembryos
- Cmeristems
- Damniotic fluid
- Ebone marrow
- Fumbilical cord
- Gphloem
9Stem cells can be cultured outside the body.
- AVerdadero
- BFalso
10Biomedical engineering involves...
- A...solving medical problems using new materials and man-made parts
- B...experimenting genetically on living organisms
- C...developing and improving existing medical knowledge with the use of plants
11Examples of biomedical engineering include:
- Aartificial pacemakers
- Bmechanical or biological heart valve replacements
- Corgan transplants
- Dstem cell development
- Eusing the genetic modification of bacteria to produce human insulin
12Which of the following apply to mechanical heart valves?
- Alikely to last for longer
- Bneed to be replaced quicker
- Cmore likely to be rejected by the body
- Deasier operation
13Genetic testing may be used to find out if an [blank_start]individual[blank_end] has a genetic disease - a disease which they have [blank_start]inherited[blank_end] and which is a result of a defect in their DNA.
To investigate a person’s DNA, [blank_start]white[blank_end] blood cells are used because they are easy to obtain from a blood sample, and (unlike [blank_start]red[blank_end] 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 [blank_start]pellet[blank_end] at the bottom of the tube.
The pellet of white blood cells is then [blank_start]suspended[blank_end] in a liquid. More chemicals are added which split open the cell membranes and release the DNA from the [blank_start]nucleus[blank_end].
The DNA is collected and then [blank_start]replicated[blank_end] (more copies of it are made) so that there is enough to test. The DNA is then broken up into smaller sections using [blank_start]enzymes[blank_end] and put onto a special gel. An electrical [blank_start]current[blank_end] is applied, and the pieces of DNA separate out along the gel.
2. Gene Probe
A gene [blank_start]probe[blank_end] is a short section of single-stranded DNA that has a [blank_start]fluorescent[blank_end] chemical attached to it which will glow under UV light. The chemical is added to a length of DNA which has the [blank_start]complementary[blank_end] 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 [blank_start]bind[blank_end] to it because it has a complementary base sequence to the gene being [blank_start]investigated[blank_end].
4. Using UV light
The gel is then viewed under [blank_start]UV[blank_end] light. If the gene is present, the gel will glow at that point. The gene has therefore been identified as being [blank_start]present[blank_end] in the person’s DNA.- Aindividual
- Binherited
- Cwhite
- Dred
- Epellet
- Fsuspended
- Gnucleus
- Hreplicated
- Ienzymes
- Jcurrent
- Kprobe
- Lfluorescent
- Mcomplementary
- Nbind
- Oinvestigated
- PUV
- Qpresent
Información
- Descripción
- GCSE (B7 - Further Biology) Biology Test sobre B7 Quiz - New Technologies, creado por Leah Firmstone el 19/06/2016.
- Autor
- Leah Firmstone
- Idioma
- English
- Visitas
- 72
- Historial
- Creado el 19 jun 2016 · actualizado el 20 jun 2016
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