FBISE Class 9th (SSC-l)
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FBISE Class 9th (SSC-l)
Answer: Prokaryotic cells lack a true membrane-bound nucleus; their genetic material lies freely in the cytoplasm.
Answer: Cytology is the branch of biology that deals with cells, while histology deals with tissues.
Answer: Mitochondria release energy from glucose and store it in ATP, so they are called the powerhouse of the cell.
Answer: Ribosomes are small granules composed of RNA and proteins and are the site of protein synthesis.
Answer: Ribosomes are the sites of protein synthesis in both prokaryotic and eukaryotic cells.
Answer: Bacteria lack a membrane-bound nucleus and membrane-bound organelles, so they are prokaryotes.
Answer: Prokaryotic cells have no membrane-bound organelles such as mitochondria, ER, or Golgi apparatus.
Answer: The nucleoid is an irregular region in the cytoplasm where the prokaryotic chromosome is located.
Answer: Prokaryotes have 70S ribosomes, whereas eukaryotic cells contain larger 80S ribosomes.
Answer: Prokaryotes generally carry a single, circular DNA molecule in the nucleoid.
Answer: All prokaryotes (archaebacteria and eubacteria) belong to kingdom Monera.
Answer: Binary fission is the common asexual method of reproduction in prokaryotes.
Answer: Bacterial cell walls contain peptidoglycan (murein), unlike plant cell walls made of cellulose.
Answer: Amoeba is a protozoan with a true nucleus, so it is eukaryotic; the others are prokaryotes.
Answer: E. coli is a bacterium, which is a prokaryote; the other options are eukaryotes.
Answer: Eukaryotes have a true nucleus enclosed in a nuclear envelope, along with membrane-bound organelles.
Answer: Plant cells have a cellulose cell wall, which animal cells do not possess.
Answer: Chloroplasts are the green plastids of plant cells used for photosynthesis; animal cells lack them.
Answer: The large central vacuole holds water and maintains turgor pressure, keeping plant cells firm.
Answer: Plants store glucose as starch, whereas animals store it as glycogen.