Biologia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

What is true of a recessive allele?

1. AIt is always harmful to the organism
2. BIt is found only on the X chromosome
3. CIts trait shows whenever one copy is present
4. DIts trait shows only when two copies are present

Which sugar is found in DNA?

1. AGlucose
2. BDeoxyribose
3. CRibose
4. DFructose

What is a monosaccharide?

1. AA fat made of glycerol and fatty acids
2. BA chain of many amino acids
3. CA single sugar unit, such as glucose
4. DTwo sugars joined together, such as sucrose

Why can an electron microscope show more detail than a light microscope?

1. AElectrons are brighter than light
2. BElectron microscopes use stronger glass lenses
3. CElectron microscopes use living cells only
4. DElectrons have a much shorter wavelength than light

Jaka jest podstawowa budowa wirusa?

1. APojedyncza komórka z rybosomami i mitochondriami
2. BŁańcuch aminokwasów bez DNA ani RNA
3. CJądro otoczone ścianą komórkową
4. DMateriał genetyczny wewnątrz otoczki białkowej

Nearly all cells in a person's body contain the same DNA. Why do nerve cells and muscle cells look and work so differently?

1. ANerve cells have lost the genes for muscle proteins
2. BMuscle cells have extra DNA from mitochondria
3. CEach cell type has a different set of chromosomes
4. DDifferent genes are switched on in each type of cell

In a trial, 20% of patients improve on a new drug and 18% improve on a placebo. What is the best conclusion?

1. AThe drug adds little benefit beyond the placebo
2. BThe placebo was harmful to the patients
3. CThe drug is ten times better than the placebo
4. DThe drug works well, because 20% of patients improved

A breastfed baby receives antibodies from its mother's milk. Why does this protection last only a short time?

1. AThe antibodies from breast milk attack the baby's own red blood cells
2. BThe baby did not make these antibodies and forms no memory cells
3. CThe baby's stomach makes the antibodies more active
4. DThe antibodies turn into memory cells after a few weeks