Lembar kerja Biologi untuk ujian masuk keperawatan dengan jawaban

Which molecules, made by immune cells, bind to specific antigens?

1. AAntibodies
2. BEnzymes
3. CPhospholipids
4. DHormones

Which enzyme unwinds the DNA double helix and separates the two strands for copying?

1. ALigase
2. BLipase
3. CAmylase
4. DHelicase

How many millilitres are in one litre?

1. A10
2. B100
3. C1000
4. D10 000

What is the role of cholesterol in animal cell membranes?

1. AIt stores the cell's genetic information
2. BIt forms a rigid wall around the cell
3. CIt keeps membrane fluidity stable as temperature changes
4. DIt carries glucose molecules across the membrane into the cell

The genetic code is described as nearly universal. What does this mean?

1. AEvery cell in the body makes the same proteins
2. BAll organisms have exactly the same genes
3. CThe same codons mean the same amino acids in nearly all organisms
4. DAll organisms have the same number of chromosomes in their cells

Mengapa bakteri Gram-positif berwarna ungu pada pewarnaan Gram?

1. ABakteri itu mengandung klorofil
2. BDinding peptidoglikannya yang tebal menahan zat warna ungu
3. CDindingnya yang tipis ditutupi membran luar yang kaya lipid
4. DBakteri itu tidak memiliki dinding sel sama sekali

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

1. AThe allele is dominant, so it spreads by itself
2. BPeople with two sickle alleles are fully healthy there
3. CMalaria causes the sickle cell mutation directly
4. DNatural selection favours the heterozygotes there

A single-celled organism has a nucleus, no cell wall and swims using cilia. In which group is it best placed?

1. ABacteria
2. BFungi
3. CProtists
4. DPlants