Робочий аркуш «Біологія для вступних іспитів на медсестринство» з відповідями

What is an allele?

1. AA pair of matching chromosomes from each parent
2. BA section of DNA between genes
3. CA protein made from a gene
4. DA different version of the same gene

What is a bacteriophage?

1. AA bacterium that infects viruses
2. BA white cell that eats bacteria
3. CA virus that infects bacteria
4. DA fungus that kills bacteria

What is the resolution of a microscope?

1. AHow many times larger it makes the image of the specimen
2. BHow bright the image appears
3. CHow large the field of view is
4. DIts ability to show two close points as separate

A tall pea plant could be TT or Tt. Which cross will best reveal its genotype?

1. ACross it with a short (tt) plant
2. BCross it with a TT plant
3. CCross it with another tall plant
4. DLet it grow for a longer time

Why can DNA profiling (fingerprinting) identify individual people?

1. ADNA in blood differs from DNA in skin
2. BRepeated non-coding DNA regions vary in length between people
3. CEvery person has a different number of chromosomes in their cells
4. DEach person's genes code for different amino acids

A cut in the skin heals as new skin cells fill the wound. Which process produces these cells?

1. AFertilisation
2. BMitosis
3. CBinary fission
4. DMeiosis

A drug lowered blood pressure in a study of 20 men aged 40 to 50. Why might the result not apply to women over 70?

1. AThe sample did not represent that group
2. BThe study had a dependent variable
3. CThe results were too precise to be trusted
4. DBlood pressure cannot be measured in older women

Cystic fibrosis is caused by a faulty CFTR protein, which forms a chloride channel in the cell membrane. Which process is directly affected?

1. AMovement of chloride ions through a membrane protein
2. BCopying of DNA in the nucleus
3. CDiffusion of oxygen molecules through the lipid bilayer
4. DProduction of ATP in the mitochondria