UNIT-3 Cell Structure and Function

“Omnis cellula a cellula – every cell arise from a pre-existing cell” who wrote this article?

• Schleiden and Schwan

• Robert Hooke

• Anton van Leeuwenhoek

• Rudolph Virchow

Which of thee following is an example of a Prokaryote?

• Protists

• Bacteria

• Fungi

• Plants

The Key difference between Prokaryotes and Eukaryotes is that Prokaryotes

• Don't have cell membrane

• Don't have ribosomes

• Don't have membrane-bound organelles

• Don't have cell wall

Size of the Ribosomes (70 S) of Prokaryotes is similar to that of ___________

• Mitochondria and Chloroplast

• Plants and Animals

• Protists and Fungi

• Mitochondria and Golgi apparatus

Plant cells don't have____________

• Centrioles

• Chloroplasts

• Cell wall

• Cell membrane

Which of the following is the control center of the cell?

• Ribosome

• Mitochondrion

• Golgi apparatus

• Nucleus

What is the main function of lysosomes?

• Protein synthesis

• Intracellular digestion

• Energy production

• DNA replication

Which organelle is known for generating energy (ATP) in the cell?

• Mitochondrion

• Chloroplast

• Nucleus

• Ribosome

The main function of the cell wall is to___________

• Store DNA

• Direct the activities of the cell

• Support and protect the cell

• Help the cell move

The smooth endoplasmic reticulum (ER) is mainly involved in:

• Lipid synthesis

• Protein synthesis

• DNA synthesis

• Photosynthesis