Scheda di esercizi di Biologia per i test di ammissione a infermieristica con soluzioni

What are restriction enzymes?

1. AEnzymes that digest fats in the intestine
2. BEnzymes that join amino acids into proteins
3. CEnzymes that cut DNA at specific base sequences
4. DEnzymes that copy RNA into DNA

Secondo la teoria cellulare, da dove provengono le nuove cellule?

1. ADa virus che entrano nel corpo
2. BDa cellule già esistenti
3. CDai minerali del cibo
4. DDa materia non vivente presente nel corpo

Quanti cromosomi ha una tipica cellula somatica umana?

1. A92
2. B44
3. C23
4. D46

Why are G–C base pairs held together more strongly than A–T pairs?

1. AA–T pairs are found only in RNA
2. BG and C are both purines, so they fit more tightly
3. CG–C pairs form three hydrogen bonds, and A–T pairs form two
4. DG–C pairs are joined by strong covalent bonds instead of hydrogen bonds

How does cytokinesis differ between animal cells and plant cells?

1. AOnly plant cells carry out cytokinesis
2. BAnimal cells build a cell plate; plant cells pinch in with a furrow
3. COnly animal cells carry out cytokinesis
4. DAnimal cells pinch in with a furrow; plant cells build a cell plate

What is the role of cholesterol in animal cell membranes?

1. AIt forms a rigid wall around the cell
2. BIt keeps membrane fluidity stable as temperature changes
3. CIt stores the cell's genetic information
4. DIt carries glucose molecules across the membrane into the cell

Quale cambiamento renderebbe più rapida la diffusione attraverso una membrana?

1. AUna maggiore differenza di concentrazione tra i due lati
2. BUna superficie di scambio più piccola
3. CUna temperatura più bassa da entrambi i lati
4. DUna membrana più spessa

The coding part of an mRNA is 900 bases long, including the start codon and the stop codon. How many amino acids are in the protein?

1. A298
2. B299
3. C300
4. D900