Užduočių lapas tema Biologija slaugos stojamiesiems egzaminams su atsakymais

Which group of biomolecules forms the basic bilayer of the cell membrane and also stores long-term energy?

1. ACarbohydrates
2. BNucleic acids
3. CProteins
4. DLipids

What is a pedigree in genetics?

1. AA list of all the genes in an organism
2. BA chart that shows how a trait is inherited in a family
3. CA picture of a person's chromosomes arranged in pairs by size
4. DA table of codons and amino acids

Kokiu vienetu dažniausiai nurodomas ląstelės dydis?

1. AMetrais (m)
2. BKilometrais (km)
3. CLitrais (L)
4. DMikrometrais

Why is water good at dissolving salts and sugars?

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

Identical twins raised in different homes have different body weights. What does this show?

1. ABody weight is controlled by a single gene
2. BThe phenotype depends on environment as well as genotype
3. CMutations happened in every cell of one twin
4. DThe twins must have different genotypes for body weight genes

Why does each type of virus infect only certain kinds of cells?

1. AIt must attach to specific receptor proteins on the cell surface
2. BIt can only enter cells that have no nucleus
3. CIt must find cells with the same DNA as its own
4. DIt can only enter cells that are dividing by meiosis at that time

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. A300
2. B298
3. C900
4. D299

The antibiotic tetracycline binds to bacterial ribosomes. Which process does it block, and why are human cells much less affected?

1. ATranscription, because human cells have no RNA polymerase of their own
2. BDNA replication, because bacteria have no DNA polymerase
3. CTranslation, because human cells have no ribosomes
4. DTranslation, because bacterial ribosomes differ from human ribosomes