OCR AS Biology 1

Welcome to your OCR AS Biology 1

1. The enzyme responsible for forming hydrogen bonds during the process of DNA replication.
2. Prokaryotic cells have a single ___________ instead of a nucleus.
3. How many oxygen molecules at a time could be carried by a haemoglobin molecule?
4. Which of the following is a double membrane bound organelle?
5. Which is not a function of golgi bodies?
6. The most common protein found in animals.
7. Prokaryotic cells have a cell wall that contains ________.
8. Select the incorrect statement regarding haemoglobin.
9. Which organelle is referred as the 'Powerhouse of the cell'?
10. Many prokaryotic cells do not have __________________.
11. What happens when a Biuret reagent is added to a solution of free amino acids?
12. Which is not a virus among the following?
13. Network of tiny tubes within the cytoplasm.
14. The site of ribosome formation.
15. Component of plant cell wall.
16. In complex multicellular organisms, eukaryotic cells become _________ for specific functions.
17. Which of the following solutions turn milky white upon adding ethanol and water?

a) A slice of potato
b) Milk
c) Palm oil
d) A piece of apple
18. Which indicates an indirect evidence for evolution?
19. How many oxygen molecules at a time could be carried by a haemoglobin molecule?