Užduočių lapas tema Biologija slaugos stojamiesiems egzaminams su atsakymais

What does phloem carry in a plant?

1. AChlorophyll to the stem
2. BCarbon dioxide from the air
3. CSugars made in the leaves
4. DWater from the roots only

What is the aim of gene therapy?

1. ATo give a patient antibiotics through a vein to kill a virus
2. BTo treat a disease by adding a working copy of a faulty gene
3. CTo change the patient's blood type
4. DTo remove all the genes from a patient's cells

What is the main job of the cell wall in a plant cell?

1. ATo make proteins for the cell
2. BTo support the cell and stop it from bursting
3. CTo control which genes are switched on in the nucleus
4. DTo release energy from glucose

Kuo sotieji riebalai skiriasi nuo nesotųjų riebalų?

1. AJie lengvai tirpsta vandenyje
2. BJie turi azoto ir sudaro baltymus
3. CJie neturi C=C dvigubų ryšių ir paprastai yra kieti
4. DJie turi daug dvigubų ryšių ir kambario temperatūroje yra skysti

What is a prion?

1. AA fungal spore that infects the brain
2. BA misfolded protein that causes normal proteins to misfold
3. CA very small virus with a DNA genome
4. DA bacterium without a cell wall that lives inside nerve cells

Nerve cells release chemical messengers (neurotransmitters) stored in vesicles. By which process are they released?

1. APhagocytosis
2. BOsmosis
3. CExocytosis
4. DEndocytosis

Cystic fibrosis is caused by a faulty CFTR protein, which forms a chloride channel in the cell membrane. Which process is directly affected?

1. AProduction of ATP in the mitochondria
2. BDiffusion of oxygen molecules through the lipid bilayer
3. CCopying of DNA in the nucleus
4. DMovement of chloride ions through a membrane protein

Why are modified viruses often used to deliver genes in gene therapy?

1. AViruses naturally insert their genetic material into host cells
2. BViruses are larger than human cells, so they can carry many genes
3. CViruses produce antibodies that fix faulty genes
4. DViruses can reproduce without a host cell