Užduočių lapas tema Biologija slaugos stojamiesiems egzaminams su atsakymais

Which of these hormones is a steroid?

1. AGlucagon
2. BTestosterone
3. CGrowth hormone
4. DInsulin

What is cytokinesis?

1. AThe condensing of chromosomes in prophase
2. BThe pairing of homologous chromosomes
3. CThe copying of DNA before division
4. DThe division of the cytoplasm into two cells

What is a chromosome?

1. AA long DNA molecule, packed with proteins, carrying many genes
2. BA single gene that codes for one protein
3. CA strand of RNA that leaves the nucleus
4. DA small organelle in the cytoplasm that makes ATP for the cell

The results of an experiment do not support the hypothesis. What should the scientist do next?

1. AChange the data so they fit the hypothesis
2. BRevise the hypothesis and test it again
3. CReport that the hypothesis was proven correct
4. DStop doing any further research on the question

What are introns?

1. ACodons that tell the ribosome to stop translation
2. BNon-coding sections removed from pre-mRNA before translation
3. CShort pieces of DNA made on the lagging strand
4. DCoding sections joined together to form the mature mRNA

The genetic code is described as nearly universal. What does this mean?

1. AAll organisms have exactly the same genes
2. BEvery cell in the body makes the same proteins
3. CAll organisms have the same number of chromosomes in their cells
4. DThe same codons mean the same amino acids in nearly all organisms

A restriction enzyme cuts at three sites in a linear piece of DNA. How many fragments are produced?

1. A2
2. B3
3. C6
4. D4

A linear DNA molecule is fully cut by a restriction enzyme, giving fragments of 500, 300 and 200 base pairs. How long was the original molecule?

1. A500 base pairs
2. B300 base pairs
3. C1000 base pairs
4. D1500 base pairs