Cevaplı Hemşirelik giriş sınavları için biyoloji çalışma kâğıdı

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

1. APhospholipids
2. BAntibodies
3. CHormones
4. DEnzymes

What is transpiration?

1. AThe loss of water vapour from the leaves of a plant
2. BThe growth of roots towards water
3. CThe movement of sugars through the phloem to the roots
4. DThe taking in of CO₂ for photosynthesis

What is the job of messenger RNA (mRNA)?

1. AIt carries amino acids to the ribosomes
2. BIt carries the genetic code from DNA to the ribosomes
3. CIt stores genetic information in the nucleus permanently
4. DIt forms the main structure of the ribosome

Which DNA bases are purines?

1. ACytosine and guanine
2. BCytosine and thymine
3. CAdenine and guanine
4. DAdenine and thymine

Which is the correct way to write the scientific name of the gut bacterium?

1. AEscherichia coli
2. Bcoli Escherichia
3. CEscherichia Coli
4. DEscherichia Coli

The sodium-potassium pump moves ions across the cell membrane. What does one cycle of the pump do?

1. AMoves 3 K⁺ out and 2 Na⁺ in, using ATP
2. BMoves 2 Na⁺ out and 3 K⁺ in, using ATP
3. CMoves 3 Na⁺ out and 2 K⁺ in, using ATP
4. DMoves Na⁺ in and K⁺ out, without using ATP

A bag made of membrane that lets only water through contains a 10% sugar solution. It is placed in a beaker of 5% sugar solution. What happens?

1. ASugar moves out of the bag until both are 7,5%
2. BWater moves into the bag, and the bag gains mass
3. CWater moves out of the bag, and the bag loses mass
4. DNothing changes, because sugar cannot cross

An old idea says giraffes got long necks because each one stretched to reach leaves and passed the longer neck to its young. Why is this idea rejected?

1. AOnly plants can pass on traits to offspring
2. BGiraffes do not eat leaves from tall trees, so stretching is not needed
3. CChanges acquired in a lifetime are not passed on in the genes
4. DNeck length is not affected by any genes