Lembaran kerja Biologi untuk peperiksaan kemasukan kejururawatan dengan jawapan

What does homozygous mean?

1. AHaving only one copy of a gene
2. BHaving an extra chromosome
3. CHaving two different alleles for a gene
4. DHaving two identical alleles for a gene

What is a Punnett square used for?

1. AShowing the order of genes on a chromosome
2. BPredicting the possible genotypes of offspring
3. CCounting the chromosomes in a cell
4. DMeasuring the size of a cell

What does gel electrophoresis separate?

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

In evolution, what does an organism's fitness mean?

1. AHow long the organism lives
2. BHow large the organism grows
3. CHow many offspring it leaves that survive and reproduce
4. DHow strong and fast the organism is compared with others

Which sequence describes the usual flow of genetic information in a cell?

1. ADNA to RNA to protein
2. BRNA to DNA to protein
3. CProtein to RNA to DNA
4. DDNA to protein to RNA

In which phase of mitosis do the chromosomes condense and the nuclear envelope break down?

1. ATelophase
2. BAnaphase
3. CProphase
4. DMetaphase

Paper discs with antibiotics X, Y and Z are placed on a plate covered with bacteria. The clear zones around them are 2 mm, 15 mm and 0 mm wide. What is the best conclusion?

1. AAll three are equally effective against these bacteria
2. BY is most effective, and the bacteria are resistant to Z
3. CZ is most effective, because no bacteria grew under the disc
4. DX is most effective, and the bacteria are resistant to Y

People who carry one sickle cell allele are more resistant to malaria. Why is the allele common in regions where malaria is widespread?

1. APeople with two sickle alleles are fully healthy there
2. BNatural selection favours the heterozygotes there
3. CThe allele is dominant, so it spreads by itself
4. DMalaria causes the sickle cell mutation directly