Lec2

Question 1

DNA is enclosed in a nuclear membrane ( T/ F )?

Answer 1

F, not enclosed

Question 2

Bacteria are:

Answer 2

◇ procaryotic
◇ Lack membrane bound organelles
◇ rigid cell wall
◇ Ribosomes are scattered in the cytoplas
◇ binary fission

Question 3

Pair of cells divide in one plane

Answer 3

Diplococci

Question 4

Chain of cells formed by dividing in one plane several times

Answer 4

Streptococci

Question 5

Divide in two planes

Answer 5

Tetrad

Question 6

Divide in three planes

Answer 6

Sarcinae

Question 7

Divide in many planes and remain together as a cluster

Answer 7

Staphylococci

Question 8

Diplococci example

Answer 8

Neisseria for Example N. Meningitidis .

Question 9

Bacilli that remain in pairs after they
divide.

Answer 9

Diplobacilli

Question 10

Bacilli that remain in chains after they divide

Answer 10

Streptobacilli

Question 11

short Bacilli that nearly looks like a cocci.

Answer 11

Coccobacilli

Question 12

comma shaped

Answer 12

Vibrio

Question 13

curved rod-shaped

Answer 13

Helicobacterium

Question 14

helical rigid

Answer 14

(spirillum)

Question 15

do not aggregate together and are always found singular.

Answer 15

Spirilla (H.elicobacter pylori)

Question 16

Antibiotics producers.
Ex. Streptomyces

Answer 16

Actinomycetes

Question 17

Myxobacteria:

Answer 17

Gram-negative
unicellular
rod-shaped

Question 18

Star-shaped bacteria example

Answer 18

Ex.Stella

Question 19

Advantages of bacteria to being small

Answer 19

◼ They have a higher surface-to-volume ratio
◼ Support greater nutrient exchange per unit cell volume,
◼ Tend to grow faster than larger cells.

Question 20

Uniport: function as co-transporters. T/F?

Answer 20

F , transport in one direction across the membrane

Question 21

Activity of lac permease is ?

Answer 21

energy-driven by proton motive force

Question 22

are firmly embedded in the membrane and are called

Answer 22

integral membrane proteins.

Question 23

not membrane embedded but nevertheless remain associated with membrane surfaces.
are called ?

Answer 23

peripheral membrane proteins

Question 24

Bacteria have branched phytanyl sidechains instead of linear (T/F)?

Answer 24

F, in Archeae

Question 25

Who is have ether bond instead of an ester bond connects the lipid to the glycerol?

Answer 25

Archeae