Užduočių lapas tema Biologija slaugos stojamiesiems egzaminams su atsakymais

Koks yra kontrolinės grupės tikslas?

1. APakeisti hipotezės poreikį
2. BGauti didžiausią galimą tikrinamo poveikio dozę
3. CKad eksperimentas greičiau baigtųsi
4. DSuteikti palyginimo pagrindą su paveikta grupe

In an enzyme reaction, what is the substrate?

1. AThe product released at the end
2. BThe substance that the enzyme acts on
3. CThe gene that codes for the enzyme
4. DThe part of the enzyme that changes shape

What is a Punnett square used for?

1. APredicting the possible genotypes of offspring
2. BMeasuring the size of a cell
3. CShowing the order of genes on a chromosome
4. DCounting the chromosomes in a cell

When plotting the results of an experiment, which variable usually goes on the y-axis?

1. AThe controlled variable
2. BThe time the experiment started
3. CThe independent variable
4. DThe dependent variable

What does Mendel's law of segregation state?

1. AGenes on different chromosomes are always inherited together
2. BThe two alleles of a gene separate so each gamete gets only one
3. CEach gamete receives both alleles of every gene
4. DDominant alleles are more common in a population than recessive ones

What do nitrogen-fixing bacteria do?

1. AThey release nitrogen gas from dead organisms into the air
2. BThey break down proteins into glucose
3. CThey convert nitrogen gas into compounds that plants can use
4. DThey turn carbon dioxide into sugar

In snapdragons, flower colour shows incomplete dominance: RR is red, RW is pink and WW is white. Two pink plants are crossed. What phenotype ratio is expected?

1. A1 red : 1 white
2. B3 red : 1 white
3. CAll pink, like the parents
4. D1 red : 2 pink : 1 white

Savanoriai geria 0, 100 arba 200 mg kofeino, o jų širdies susitraukimų dažnis matuojamas po 30 minučių. Kas yra priklausomasis kintamasis?

1. AŠirdies susitraukimų dažnis po 30 minučių
2. BKofeino dozė
3. CPatys savanoriai
4. D30 minučių laukimo laikas