Welcome to your AQA AS Biology 4 1. Prokaryotic cells have a cell wall that contains ________. Murein Cellulose Hemicellulose Pectin2. Lysosomes are vesicles formed by the ______. Mitochondria Nucleus Golgi apparatus Ribosomes3. Cisternae is present in __________. Endoplasmic reticulum Ribosomes Golgi complex Mitochondria4. 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. a, b & d b & c only a & d only a & b only5. Select the correct statement about viruses. They consist of only DNA. Viruses are non-living organisms. Viruses are multicellular organisms. Viruses are living organisms.6. Select the incorrect sentence out of the following. Magnification is the ability of optical instruments to make an object bigger. A high magnification does not always guarantee a high resolution. Resolution is the ability of optical instruments to produce images that are clearer, finer, and sharper. Magnification and resolution are not dependant on each other.7. What is the function of rRNA? Forms ribosomes which act as the site for protein synthesis. Helps in the process called translation. Helps in unwinding the DNA strands. Helps in the process called transcription.8. The protective protein coat in a virus. Capsid Tail Fibres Membrane envelope9. What is the function of tRNA in protein synthesis? Carries the code for building a specific protein. Ribosome formation. It rewrites the sequence of bases of a section of DNA in a process called transcription. Carries relevant amino acids upto the ribosome.10. Select the incorrect statement from the following. Many cancer treatments are directed at controlling the rate of cell division. Mitosis is a controlled process. Uncontrolled cell division can lead to the formation of tumours and of cancers. Reproduction in prokaryotic cells happen through meiosis or mitosis.11. The microscope which uses electrons to provide a three-dimensional view of the surface of the object. Scanning electron microscope Compound microscope Transmission electron microscope Simple microscope12. 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? 100mm 0.1mm 1mm 10mm13. What is the function of mRNA in protein synthesis? Transcripts the base sequence of DNA molecule and carries to the cytoplasm. Unwinds the DNA double helix. Associates with a set of proteins to form ribosomes. Deciphers the codons.14. 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? 0.2 0.002 2 0.0215. Which of the following organelles is the largest and the most easily observed with the light microscope? Ribosomes Mitochondria Nucleus Lysosomes16. What is the fluid-filled space that surrounds the cristae within a mitochondrion? Thylakoid Grana Stroma Matrix17. 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? x10 x1000 x100 x1000018. Which is not a virus among the following? Influenza HIV Bacteriophage Salmonella19. 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? 0.4 0.0004 0.04 0.00420. Choose the correct statement regarding plastids. Plastids are single membrane bound organelles. They are present in both plant and animall cells. There are 2 types of plastids. Chloroplast is a type of plastid.21. A similarity between transmission electron microscope and scanning electron microscope. Both produce a 3D visual image. Both can be used to view the insides of each organelle. Both are used to observe dead organisms. Both can attain the same amount of magnification.22. The site of lysosome formation. Smooth endoplasmic reticulum Golgi apparatus Ribosomes Mitochondria23. Who coined the term 'Cell'? Anton Van Leewenhoek Matthias Schleiden Robert Hooke Theodor Schwann24. The microscope which has one lens to magnify images using light. Electron microscope Compound microscope Simple microscope Scanning electron microscopeTime is Up!