Užduočių lapas tema Biologija slaugos stojamiesiems egzaminams su atsakymais

Kurios žmogaus ląstelės susidaro mejozės būdu?

1. ARaudonieji kraujo kūneliai kaulų čiulpuose
2. BKepenų ląstelės
3. CKiaušialąstės ir spermatozoidai
4. DOdos ląstelės

What is homeostasis?

1. ABreaking down food for energy
2. BKeeping a stable internal environment
3. CMaking identical copies of a cell
4. DChanging a species over many generations

What does it mean that a cell membrane is selectively permeable?

1. AIt lets no substance cross at all
2. BIt lets only water molecules cross
3. CIt lets every substance cross freely in both directions
4. DIt lets some substances cross but not others

When most people in a community are vaccinated, people who cannot be vaccinated are also protected. Why?

1. AThe vaccine spreads from person to person
2. BThe pathogen has too few hosts to spread easily
3. CThe pathogen mutates into a harmless form
4. DVaccinated people make antibodies for others

What is the role of ribosomal RNA (rRNA)?

1. AIt forms part of the ribosome and helps join amino acids
2. BIt brings single amino acids to the ribosome
3. CIt carries the code from DNA to the ribosome
4. DIt stores genetic information in the nucleus

What does Mendel's law of segregation state?

1. AThe two alleles of a gene separate so each gamete gets only one
2. BGenes on different chromosomes are always inherited together
3. CEach gamete receives both alleles of every gene
4. DDominant alleles are more common in a population than recessive ones

Motina, kurios kraujo grupė A (genotipas Iᴬi), ir tėvas, kurio grupė B (Iᴮi), susilaukia vaikų. Kokios kraujo grupės galimos?

1. ATik A, B ir AB
2. BTik AB
3. CA, B, AB ir O
4. DTik A ir B

At 100× total magnification, the field of view of a microscope is 2 mm wide. What is its width at 400×?

1. A8 mm
2. B0,5 mm
3. C2 mm
4. D0,2 mm