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

What does transfer RNA (tRNA) do?

1. AIt copies DNA in the nucleus
2. BIt brings amino acids to the ribosome
3. CIt carries the code out of the nucleus
4. DIt joins two DNA strands together

Quali sostanze sono prodotte dalla fotosintesi?

1. AAcido lattico e ATP
2. BAnidride carbonica e acqua
3. CGlucosio e ossigeno
4. DProteine e azoto

Nel DNA, con quale base si appaia sempre l'adenina?

1. ACitosina
2. BGuanina
3. CTimina
4. DUracile

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

Quale sequenza è complementare al filamento di DNA A-T-G-C-C-A?

1. AA-T-G-C-C-A
2. BU-A-C-G-G-U
3. CG-C-A-T-T-G
4. DT-A-C-G-G-T

Why is water good at dissolving salts and sugars?

1. AIt has a very low boiling point
2. BIts molecules are polar
3. CIt contains carbon atoms
4. DIts molecules are nonpolar

In the Hershey–Chase experiment, viruses were labelled with radioactive phosphorus in their DNA or radioactive sulfur in their protein. Only the phosphorus entered the infected bacteria. What did this show?

1. ABacteria take up any radioactive substance
2. BDNA, not protein, is the genetic material of the virus
3. CViruses contain no DNA at all
4. DProtein, not DNA, is the genetic material of the virus

A student puts a fertilised plant in a sunny window and an unfertilised plant in a dark cupboard. The fertilised plant grows more. What is the main flaw?

1. AThe dependent variable was not measured
2. BThe student used too much fertiliser on the plant in the window
3. CThere was no hypothesis to test
4. DTwo variables were changed, so the cause is unclear