Biologia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

Which molecules, made by immune cells, bind to specific antigens?

1. AAntibodies
2. BEnzymes
3. CPhospholipids
4. DHormones

Which definition of a species is most often used for animals?

1. AAll of the different organisms that live together in one area
2. BAll the animals that eat the same food
3. CAny organisms that look alike
4. DA group that can interbreed and have fertile offspring

Które cztery zasady azotowe występują w DNA?

1. AAdenina, tymina, glukoza i cytozyna
2. BAdenina, tymina, guanina i cytozyna
3. CAlanina, tymina, glicyna i cysteina
4. DAdenina, uracyl, guanina i cytozyna

Which is an example of negative feedback?

1. AContractions growing stronger during labour
2. BBlood clotting speeding up once it starts
3. CSweating when body temperature rises
4. DA wound becoming more inflamed over time

Why is the ABO blood group system an example of multiple alleles?

1. AEach person carries three different alleles of the ABO gene
2. BBlood type is controlled by many separate genes
3. CThere are three alleles of the gene in the population
4. DThe gene is found on several chromosomes

Where does the Krebs (citric acid) cycle take place in a eukaryotic cell?

1. AIn the cytoplasm
2. BOn the rough endoplasmic reticulum
3. CIn the mitochondrial matrix
4. DIn the nucleus

Some chemotherapy drugs stop spindle fibres from forming. Why do they often cause hair loss and damage to the gut lining?

1. AThese cells divide by meiosis instead of mitosis
2. BThese cells have no mitochondria
3. CThese tissues are made only of haploid cells
4. DThese tissues also contain rapidly dividing cells

Scientists put a human gene into bacteria to make a protein. Why do they use a DNA copy made from the mature mRNA instead of the gene taken straight from human DNA?

1. ABacteria cannot read human codons
2. BBacteria cannot remove introns
3. CBacteria have no ribosomes
4. DHuman DNA has no start codons