Užduočių lapas tema Biologija slaugos stojamiesiems egzaminams su atsakymais

Kokios formos yra DNR molekulė?

1. AViena tiesi grandinė
2. BTrigubė spiralė
3. CDviguba spiralė
4. DPlokščias žiedas

Kuri bazė yra RNR, bet nėra DNR?

1. AGuaninas
2. BTiminas
3. CAdeninas
4. DUracilas

Kas eksperimente yra priklausomasis kintamasis?

1. ATikrinama hipotezė
2. BBet kuris veiksnys, išlaikomas pastovus
3. CVeiksnys, matuojamas poveikiui nustatyti
4. DVeiksnys, kurį tyrėjas sąmoningai keičia

Lactose (milk sugar) is a disaccharide. Which two monosaccharides is it made of?

1. AFructose and galactose
2. BGlucose and galactose
3. CGlucose and fructose
4. DGlucose and glucose

What is the job of the checkpoints in the cell cycle?

1. ATo join the two daughter cells back together
2. BTo speed up division whenever the cell is short of nutrients or space
3. CTo stop the cycle if the DNA is damaged or the cell is not ready
4. DTo copy the DNA a second time before mitosis

What happens to an enzyme after it has catalysed a reaction?

1. AIt changes into the substrate
2. BIt is released unchanged and can be used again
3. CIt becomes part of the product and leaves with it
4. DIt is broken down into amino acids

A pondweed plant is placed in water, and a lamp is moved closer to it. The plant gives off more bubbles per minute. What is the best conclusion?

1. AThe bubbles are oxygen, and photosynthesis speeds up with more light
2. BThe bubbles are nitrogen, and light breaks down the plant cells
3. CThe bubbles are carbon dioxide, and respiration speeds up with more light
4. DThe bubbles are oxygen, and the lamp heats the water until it boils

A drug lowered blood pressure in a study of 20 men aged 40 to 50. Why might the result not apply to women over 70?

1. AThe sample did not represent that group
2. BBlood pressure cannot be measured in older women
3. CThe study had a dependent variable
4. DThe results were too precise to be trusted