Lembar kerja Biologi untuk ujian masuk keperawatan dengan jawaban

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

1. AIonic bonds between the phosphates
2. BDisulfide bonds between the bases
3. CPeptide bonds between the sugars
4. DHydrogen bonds between the bases

What is the job of the capsule found around some bacteria?

1. AIt helps the bacterium make energy by photosynthesis
2. BIt is used to swim through liquids
3. CIt holds the bacterium's main chromosome
4. DIt protects the cell, for example from white blood cells

What is the main role of carbohydrates in the human diet?

1. ATo carry the body's genetic information
2. BTo build muscle tissue
3. CTo form antibodies
4. DTo provide a quick source of energy

Yeast in bread dough breaks down sugar without oxygen. What does it produce?

1. ALactic acid and carbon dioxide
2. BOxygen and water
3. CEthanol and carbon dioxide
4. DGlucose and oxygen

Which DNA bases are purines?

1. AAdenine and guanine
2. BCytosine and thymine
3. CCytosine and guanine
4. DAdenine and thymine

Mengapa suhu yang sangat tinggi menghentikan kerja sebagian besar enzim?

1. APanas membuat enzim langsung terurai menjadi asam amino
2. BSubstrat berubah menjadi enzim yang lain
3. CEnzim terdenaturasi: sisi aktifnya berubah bentuk
4. DEnzim bergerak terlalu lambat untuk bertemu substrat

Griffith injected mice with heat-killed harmful bacteria mixed with live harmless bacteria. The mice died, and live harmful bacteria were found in them. What did this show?

1. AThe mice were killed by the dead bacteria alone
2. BA substance from the dead bacteria changed the harmless ones
3. CHeat makes harmless bacteria become harmful when they are injected
4. DBacteria can be killed by the immune system of mice

A student puts a fertilised plant in a sunny window and an unfertilised plant in a dark cupboard. The fertilised plant grows more. What is the main flaw?

1. AThe dependent variable was not measured
2. BThere was no hypothesis to test
3. CTwo variables were changed, so the cause is unclear
4. DThe student used too much fertiliser on the plant in the window