Question

1. What happens to E. coli when lactose is not present? (Points : 1)

The enzymes needed to break down lactose are continually produced.

The genes that produce the enzymes needed to break down lactose are not expressed.

E. coli is not able to survive without lactose.

The genes required to produce the enzymes that break down lactose are destroyed.

Answer 1

not sure on this one but i think its b

Answer 2

@jdoe0001

Answer 3

@pooja195

Answer 4

which one do you think?

Answer 5

b

Answer 6

oops i didnt read the first thing sorry yes B is correct :)

Answer 7

thanks

Answer 8

have 2 more mind helping?

Answer 9

i can help :)

Answer 10

2. When is gene expression blocked in the lac operon system? (Points : 1)
The repressor protein blocks the genes from making mRNA.
Lactose binds to the repressor and changes its shape.
RNA polymerase begins transcribing the genes.
The repressor protein destroys the genes required to produce enzymes.

Answer 11

i think its a on this one

Answer 12

thats correct :)