AQA AS Biology 4

Welcome to your AQA AS Biology 4

1. What is the measured size of a plant cell photograph if the actual size of the cell is 0.010 and the magnification is x1000?
2. If a specimen appeared 20mm in length under a microscope with a magnification of 1,000 times, what is the calculation of the actual length?
3. The microscope which has one lens to magnify images using light.
4. Select the correct statement about viruses.
5. What is the function of rRNA?
6. What is the function of mRNA in protein synthesis?
7. Who coined the term 'Cell'?
8. Which is not a virus among the following?
9. Prokaryotic cells have a cell wall that contains ________.
10. Choose the correct statement(s).

a) Animal cells are eukaryotic cells.
b) Vacuole is a fluid filled organelle.
c) Lysosomes are the digesters of prokaryotic cells.
d) Bacteria are living organisms.
11. What is the fluid-filled space that surrounds the cristae within a mitochondrion?
12. What is the function of tRNA in protein synthesis?
13. Choose the correct statement regarding plastids.
14. Lysosomes are vesicles formed by the ______.
15. The nucleus in a photograph of a cell measures 2 mm across. If the magnification in the photograph is × 500, what is the actual size of the nucleus?
16. The microscope which uses electrons to provide a three-dimensional view of the surface of the object.
17. Which of the following organelles is the largest and the most easily observed with the light microscope?
18. The site of lysosome formation.
19. A similarity between transmission electron microscope and scanning electron microscope.
20. Select the incorrect sentence out of the following.
21. A plant cell in a photograph measures 25 mm across. If the actual size of the cell is 0.025 mm, what is the magnification in the photograph?
22. Select the incorrect statement from the following.
23. Cisternae is present in __________.
24. The protective protein coat in a virus.