1.2.Ultrastructure of Cells_Prokaryotes

Question 1

Prokaryotes

Answer 1

means “before nucleus”

• prokaryotes don’t have a nuclei.
• instead the cell_ is comprised of single circular chromosomes in the central part of the part of the cell called the nucleoid.

Question 2

Similarities(with Eukaryotes)

Answer 2

• Both have DNA
• Both have Ribosomes
• Both have Cytoplasm
• Bothe have have Plasma membrane_ Phospholipid bi-layer.

Question 3

Features of Prokaryotes

Answer 3

• DNA Free Cytoplasm(Nucliod region)
• DNA in ring form of proteins(naked DNA)
• No membrane bound organelle.
• No mitochondria.

Question 4

Features of Prokaryotes_2

Answer 4

• Single celled organism
• 70 Ribosomes
• Reproduction through binary fission.
• No internal compartmentalization to form organelles.

Question 5

Not-membrane bound organelles

Answer 5

• Cell wall: Protects protein-based coating
• Plasma membrane: Selectively permeable, controls entry and exit of materials out of the cells.
• Pili: attach to other bacteria for DNA transfer.

Question 6

Not-membrane bound organelles

Answer 6

• Cytoplasm: contains enzymes for metabolic processes.
• Nucleoid: closed-loops of Bacterial DNA_-(Condensed Area)
• Ribosomes: Protein synthesis (Transcription and translation)
• Flagella: Whiplash- like motion causes Movement.