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

Scheda di esercizi di Biologia per i test di ammissione a infermieristica gratuita e stampabile: 8 esercizi dal livello facile a quello d’esame, con le soluzioni. Stampala o salvala come PDF.

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Nome: ____________________   Data: ____________

1.Facile

What does transfer RNA (tRNA) do?

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

What is a haploid cell?

  1. AA cell with two sets of chromosomes
  2. BA cell with an extra chromosome
  3. CA cell with one set of chromosomes
  4. DA cell with no nucleus
3.Facile

What is a neuron?

  1. AA blood cell that carries oxygen around the body
  2. BA muscle cell that contracts
  3. CA nerve cell that carries electrical signals
  4. DA bone cell that stores calcium
4.Media

Dove avviene la traduzione?

  1. ANella parete cellulare
  2. BNei ribosomi
  3. CAll'interno del nucleo
  4. DNei lisosomi
5.Media

Un filamento stampo di DNA si legge T-A-C. Qual è il codone di mRNA corrispondente?

  1. AA-T-G
  2. BT-A-C
  3. CA-U-G
  4. DU-T-G
6.Media

What is meant by independent assortment in meiosis?

  1. AAll chromosomes from the mother go into the same gamete
  2. BHomologous pairs line up randomly, so gametes get different mixes of chromosomes
  3. CDNA is copied separately in each chromosome
  4. DSister chromatids stay joined until the end of meiosis, so all gametes are identical
7.Difficile

Ignoring crossing over, how many different combinations of chromosomes can one person's gametes have because of independent assortment?

  1. A2²³, about 8 million
  2. B2 × 23, which is 46
  3. C23², about 529
  4. D46, one for each chromosome
8.Difficile

A point mutation changes a codon in the middle of a gene into a stop codon. What is the most likely effect?

  1. AA shortened protein that usually does not work
  2. BA protein that is longer than normal
  3. CA protein with one different amino acid
  4. DNo change, because stop codons are ignored

Soluzioni

  1. 1. D · It brings amino acids to the ribosome
  2. 2. C · A cell with one set of chromosomes
  3. 3. C · A nerve cell that carries electrical signals
  4. 4. B · Nei ribosomi
  5. 5. C · A-U-G
  6. 6. B · Homologous pairs line up randomly, so gametes get different mixes of chromosomes
  7. 7. A · 2²³, about 8 million
  8. 8. A · A shortened protein that usually does not work

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