Užduočių lapas tema Biologija slaugos stojamiesiems egzaminams su atsakymais

What is an ecosystem?

1. AAll the members of one species in an area
2. BThe weather in a particular region
3. CA single organism together with all of its organs and tissues
4. DThe living things in an area and their non-living surroundings

In biology, what is a clone?

1. AA genetically identical copy of an organism, cell or gene
2. BA cell with an extra chromosome
3. CAn offspring of two different parents
4. DAn organism that carries genes from two different species

What is activation energy?

1. AThe energy plants take in from sunlight
2. BThe heat released when a reaction finishes
3. CThe energy needed to start a chemical reaction
4. DThe energy stored in a molecule of ATP

A patient's heart rate is measured four times: 70, 72, 74 and 80 beats per minute. What is the mean?

1. A73 beats per minute
2. B80 beats per minute
3. C72 beats per minute
4. D74 beats per minute

HIV is a retrovirus. What does its enzyme reverse transcriptase do?

1. AIt makes proteins from the virus's DNA
2. BIt makes RNA from the host's DNA
3. CIt breaks down the host's ribosomes
4. DIt makes DNA from the virus's RNA

What happens to an enzyme after it has catalysed a reaction?

1. AIt is broken down into amino acids
2. BIt becomes part of the product and leaves with it
3. CIt is released unchanged and can be used again
4. DIt changes into the substrate

Why are mutations in mitochondrial DNA passed on only from mothers to their children?

1. AOnly women have mitochondria in their cells
2. BSperm cells contain no DNA at all
3. CThe zygote's mitochondria come from the egg
4. DMitochondrial DNA is on the X chromosome

Raumenų ląstelės sunaudoja daug energijos. Kurių organelių tikėtumėtės jose rasti dideliu kiekiu?

1. AVakuolių
2. BChloroplastų
3. CLizosomų
4. DMitochondrijų