Biologia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

What does gel electrophoresis separate?

1. AChromosomes by their colour
2. BCells by their shape
3. CBlood into plasma and cells
4. DDNA fragments by size

Jaka jest najmniejsza jednostka uznawana za żywą?

1. AAtom
2. BKomórka
3. CTkanka
4. DCząsteczka

What are cilia?

1. AOpenings in the nuclear envelope
2. BSmall round sacs that hold digestive enzymes
3. CShort hair-like projections that beat in waves
4. DFolds of the inner mitochondrial membrane that make ATP

Why can small nonpolar molecules cross the cell membrane easily while ions cannot?

1. AThe bilayer's core is made of hydrophobic tails
2. BThe membrane is made mostly of long carbohydrate chains
3. CThe membrane carries a strong positive charge
4. DIons are larger than most membrane proteins

Why are stains such as iodine or methylene blue added to cells on a microscope slide?

1. ATo make structures easier to see
2. BTo keep the cells alive for longer
3. CTo make the cells larger
4. DTo make the cells divide

Jaka jest podstawowa budowa wirusa?

1. AŁańcuch aminokwasów bez DNA ani RNA
2. BMateriał genetyczny wewnątrz otoczki białkowej
3. CPojedyncza komórka z rybosomami i mitochondriami
4. DJądro otoczone ścianą komórkową

Two plants are crossed, and about half of the offspring show the dominant trait and half show the recessive trait. What are the most likely genotypes of the parents?

1. AHeterozygous × homozygous recessive
2. BHomozygous dominant × heterozygous
3. CHomozygous dominant × homozygous recessive
4. DHeterozygous × heterozygous

A green plant is kept in a sealed jar in complete darkness for a day. What happens to the carbon dioxide level in the jar?

1. AIt rises, because the plant respires but cannot photosynthesise
2. BIt stays the same, because plants do not respire
3. CIt falls, because plants take in more CO₂ when they respire in the dark
4. DIt falls, because the plant keeps photosynthesising