Užduočių lapas tema Biologija slaugos stojamiesiems egzaminams su atsakymais

Which of these diseases is caused by a virus?

1. AMalaria
2. BAthlete's foot
3. CTuberculosis
4. DInfluenza

Which piece of equipment gives the most precise measurement of a liquid volume?

1. AA beaker
2. BA Petri dish
3. CA test tube
4. DA graduated cylinder

What is a sister chromatid?

1. AOne of two identical copies of a chromosome joined at the centromere
2. BOne of the two sex chromosomes
3. CA small ring of DNA found in bacteria
4. DA chromosome that is inherited from the mother only, never the father

Why does PCR use a DNA polymerase taken from bacteria that live in hot springs?

1. AIt survives the high temperatures used to separate the strands
2. BIt works only in the dark, like the bacteria it comes from
3. CIt copies RNA as well as DNA
4. DIt makes the DNA strands stick together

Which polymer is correctly matched with its monomer?

1. AStarch and glucose
2. BProtein and nucleotide
3. CDNA and amino acid
4. DGlycogen and fatty acid

In gel electrophoresis, why does DNA move towards the positive electrode?

1. ADNA has a positive charge from the nitrogen bases it contains
2. BDNA has no charge and moves at random
3. CDNA is pulled by gravity through the gel
4. DDNA has a negative charge from its phosphate groups

Home pregnancy tests use antibodies that bind the hormone hCG. Why do they react with hCG and not with other proteins in urine?

1. AEach antibody binds a specific antigen shape
2. BThe hormone hCG is a type of antibody itself
3. CUrine contains no other proteins at all
4. DAntibodies bind every protein but change colour only with hCG

Why can standard DNA profiling not tell identical twins apart?

1. AIdentical twins have no non-coding DNA
2. BTwins always share the same fingerprints on their hands
3. CIdentical twins come from one zygote and have the same DNA
4. DOnly one twin inherits the father's DNA