Cevaplı Hemşirelik giriş sınavları için biyoloji çalışma kâğıdı

What is homeostasis?

1. AChanging a species over many generations
2. BKeeping a stable internal environment
3. CBreaking down food for energy
4. DMaking identical copies of a cell

What is the main job of the large central vacuole in a plant cell?

1. AIt copies DNA before the cell divides
2. BIt captures light energy for photosynthesis
3. CIt assembles proteins from amino acids
4. DIt stores water and keeps the cell firm

Which enzyme adds new nucleotides to build a new DNA strand?

1. APepsin
2. BRNA polymerase
3. CHelicase
4. DDNA polymerase

Why are G–C base pairs held together more strongly than A–T pairs?

1. AA–T pairs are found only in RNA
2. BG and C are both purines, so they fit more tightly
3. CG–C pairs are joined by strong covalent bonds instead of hydrogen bonds
4. DG–C pairs form three hydrogen bonds, and A–T pairs form two

What is the job of the checkpoints in the cell cycle?

1. ATo speed up division whenever the cell is short of nutrients or space
2. BTo stop the cycle if the DNA is damaged or the cell is not ready
3. CTo join the two daughter cells back together
4. DTo copy the DNA a second time before mitosis

Bir alyuvar saf suya konuyor. En olası sonuç nedir?

1. ABüzülür ve buruşur
2. BAynı boyutta kalır
3. Cİki hücreye bölünür
4. DŞişer ve patlayabilir

Why are there usually far fewer top predators than herbivores in an ecosystem?

1. AEnergy is lost at each step, leaving little for the top level
2. BHerbivores eat the young of top predators
3. CTop predators reproduce faster than herbivores, so they die sooner
4. DTop predators need less energy than herbivores

Finches on the Galápagos Islands have different beak shapes on islands with different foods. What is the best explanation?

1. ANatural selection favoured beaks suited to each food source
2. BThe beaks changed because the birds chose to eat new food
3. CThe birds were all created with the same beak and it never changed
4. DEach bird changed its beak by using it more