Cell structure and Function

Question 1

what are peroxisomes ?

Answer 1

• vesicles containing oxidative enzymes such as catalase
• lipid metabolism

Question 2

what is the role of catalase ?

Answer 2

• breaks down hydrogen peroxide into hydrogen and water

Question 3

what is the function of lysosomes ?

Answer 3

• intracellular digestion + breaks down waste

Question 4

what are the 3 basic shapes of bacteria ?

Answer 4

• coccus (spherical)
• bacillus (rod - shaped)
• spirllium (spiral ) or spirochete (flexible)

Question 5

what is the role of the mesosome in bacterial cells ?

Answer 5

• plasma membrane folds to increase surface area

Question 6

what is the glycocalyx ?

Answer 6

• thick gel coating outside cell wall for protection

Question 7

what is the nucleoid ?

Answer 7

• location of bacterial DNA
• single circular DNA strand

Question 8

what is the function of fimbriae in bacterial cells ?

Answer 8

• hair like bristles allow adhesion to surfaces

Question 9

what is sex/conjugation pili?

Answer 9

• elongated appendage that allows DNA transfer to other bacterial cells