Lembar kerja Biologi untuk ujian masuk keperawatan dengan jawaban

What is the main job of the large central vacuole in a plant cell?

1. AIt stores water and keeps the cell firm
2. BIt captures light energy for photosynthesis
3. CIt copies DNA before the cell divides
4. DIt assembles proteins from amino acids

Which bonds hold the two strands of a DNA double helix together?

1. AHydrogen bonds between the bases
2. BPeptide bonds between the sugars
3. CIonic bonds between the phosphates
4. DDisulfide bonds between the bases

What does gel electrophoresis separate?

1. ACells by their shape
2. BBlood into plasma and cells
3. CChromosomes by their colour
4. DDNA fragments by size

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

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

What are introns?

1. AShort pieces of DNA made on the lagging strand
2. BCoding sections joined together to form the mature mRNA
3. CCodons that tell the ribosome to stop translation
4. DNon-coding sections removed from pre-mRNA before translation

Which statement best describes biological evolution?

1. AChange in the inherited traits of a population over generations
2. BGrowth of an organism from a single zygote to a fully grown adult
3. CChange in the body of one organism during its lifetime
4. DMovement of animals to a new habitat each year

In a trial, 20% of patients improve on a new drug and 18% improve on a placebo. What is the best conclusion?

1. AThe drug adds little benefit beyond the placebo
2. BThe drug works well, because 20% of patients improved
3. CThe drug is ten times better than the placebo
4. DThe placebo was harmful to the patients

Why can O-negative red blood cells be given to patients of almost any blood type in an emergency?

1. ATheir plasma contains anti-A and anti-B antibodies
2. BThey carry all of the A, B and RhD antigens
3. CThey have no haemoglobin to react with
4. DThey carry no A, B or RhD antigens