Užduočių lapas tema Biologija slaugos stojamiesiems egzaminams su atsakymais

What is a decomposer?

1. AAn organism that breaks down dead material
2. BAn animal that eats only plants
3. CAn animal that hunts other animals
4. DAn organism that makes food from sunlight

What does xylem carry in a plant?

1. AWater and minerals from the roots upward
2. BSeeds from the flowers to the soil
3. CSugars from the leaves to the roots
4. DOxygen from the leaves to the roots

What does sterilisation mean?

1. AKilling or removing all microorganisms, including spores
2. BKilling only the viruses on a surface
3. CWashing away visible dirt with water
4. DReducing the number of microbes on the skin before an injection

What does it mean that a person's blood is Rh negative?

1. ATheir red cells carry extra RhD antigen
2. BTheir red cells lack the RhD antigen
3. CTheir plasma has no antibodies at all
4. DTheir red cells lack the A and B antigens

Why does each type of virus infect only certain kinds of cells?

1. AIt must find cells with the same DNA as its own
2. BIt can only enter cells that have no nucleus
3. CIt must attach to specific receptor proteins on the cell surface
4. DIt can only enter cells that are dividing by meiosis at that time

Why do red blood cells have a flattened, biconcave disc shape?

1. AIt lets them hold a larger nucleus and more DNA
2. BIt gives a large surface area for gas exchange
3. CIt helps them divide faster
4. DIt makes them stick to vessel walls

PCR starts with one double-stranded DNA molecule, and the number of copies doubles each cycle. How many copies are there after 10 cycles?

1. A1024
2. B100
3. C512
4. D20

Du sveiki tėvai susilaukia vaiko, sergančio liga. Darant prielaidą, kad tai vieno geno požymis, koks labiausiai tikėtinas paaiškinimas?

1. AVaikas paveldėjo požymį tik iš tėvo Y chromosomos
2. BPožymis yra dominantinis ir abu tėvai serga
3. CPožymis yra dominantinis ir vienas iš tėvų yra homozigota
4. DPožymis yra recesyvinis ir abu tėvai yra nešiotojai