Lembaran kerja Biologi untuk peperiksaan kemasukan kejururawatan dengan jawapan

In an enzyme reaction, what is the substrate?

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

Which sugar is found in DNA?

1. AGlucose
2. BFructose
3. CRibose
4. DDeoxyribose

What is the single most important way to prevent the spread of infection in hospitals?

1. AHand hygiene
2. BOpening the windows
3. CWearing a hair net
4. DGiving every patient antibiotics

A tablet contains 2.5 g of a substance. How many milligrams is this?

1. A2500 mg
2. B25 mg
3. C0.0025 mg
4. D250 mg

Why do the palisade cells near the top surface of a leaf contain many chloroplasts?

1. AThey store most of the plant's water for dry periods
2. BThey get the most light and do most of the photosynthesis
3. CThey carry sugars from the leaves down to the roots
4. DThey protect the leaf from insects and strong winds

Golden rice was genetically modified to make beta-carotene. What is the aim?

1. ATo increase the protein content of the rice
2. BTo make the rice resistant to all insects
3. CTo help prevent vitamin A deficiency
4. DTo make the rice grow faster in cold climates

Why are modified viruses often used to deliver genes in gene therapy?

1. AViruses produce antibodies that fix faulty genes
2. BViruses naturally insert their genetic material into host cells
3. CViruses are larger than human cells, so they can carry many genes
4. DViruses can reproduce without a host cell

Plants in waterlogged soil take up fewer mineral ions, even when the ions are plentiful. What is the best explanation?

1. AWaterlogged roots carry out more photosynthesis
2. BMineral ions only enter by osmosis, and osmosis stops in wet soil
3. CRoot cells lack oxygen, so less ATP is made for active transport
4. DWater dilutes the ions so much that roots cannot detect them