Biologia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

Które z poniższych jest grzybem?

1. AWirus grypy
2. BDrożdże
3. CEscherichia coli
4. DAmeba

What is an organism's genotype?

1. AThe alleles it carries for a trait
2. BThe environment in which it lives
3. CThe traits that can be seen or measured
4. DThe number of cells in its body

What is a zygote?

1. AThe diploid cell formed when a sperm fertilises an egg
2. BA body cell that has just completed its first round of mitosis
3. CAn unfertilised egg cell
4. DA haploid cell made by meiosis

In evolution, what does an organism's fitness mean?

1. AHow strong and fast the organism is compared with others
2. BHow long the organism lives
3. CHow many offspring it leaves that survive and reproduce
4. DHow large the organism grows

What happens when a ribosome reaches a stop codon on the mRNA?

1. AA special amino acid is added to end the chain
2. BTranslation ends and the protein is released
3. CThe ribosome goes back to the start codon
4. DThe mRNA is copied back into DNA

What is the function of the pores in the nuclear envelope?

1. AThey attach the nucleus to the cell membrane
2. BThey let molecules such as mRNA pass in and out
3. CThey let chromosomes leave the nucleus to be copied
4. DThey make ribosomal RNA for the cell

A pre-mRNA is 3000 bases long, and 1200 bases of introns are removed. If all remaining bases code for amino acids, what is the largest number of amino acids in the protein?

1. A600
2. B1800
3. C400
4. D1000

How does the CRISPR-Cas9 gene-editing system find the right place to cut DNA?

1. AA guide RNA pairs with the matching DNA sequence
2. BThe Cas9 protein cuts DNA at random sites
3. CIt binds only to the start codon of every gene
4. DIt reads the amino acid sequence of the protein