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iragen [17]
3 years ago
13

Jenny wants to determine if a new brand name washing detergent is better than her old detergent. She washes ten dirty t-shirts w

ith the new washing detergent. After washing, she thinks they are cleaner using the new detergent. What can she do to be sure the new washing detergent works better than the old detergent?
Biology
1 answer:
Alex787 [66]3 years ago
8 0
She could use a control to compare her data to and make sure it is cleaner. Ex. Use the old detergent on ten shirts and then use the new detergent on another ten shirts. She would then compare the shirts she did each detergent on and come up with her conclusion.
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nasty-shy [4]

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Many mutations have been identified in the lac operon. A particular mutation in the CRP gene make the CRP protein bind to the Pl
maksim [4K]

Answer:

a. + glucose, + lactose  = On

b. - glucose, - lactose  = Off

c. + glucose, - lactose  = Off

d. - glucose, + lactose = On

Explanation:

Lac operon has both types of control, repressible and inducible.

Whenever glucose level is low in the cell, an enzyme known as adenylyl cyclase raises the level of cAMP which forms a dimer with CRP protein and they both act as activator of lac operon and cause expression.

Apart from this, when lactose is present in the cell, β-galactosidase enzyme metabolizes lactose to form allolactose which causes allosteric repulsion in the lac repressor and causes its removal from the operator. As soon as repressor is removed lac operon gets activated.

In wild type lac operons, the expression of lac operon occurs when glucose level is low in the cell and lactose is present but in this mutant presence or absence of glucose will not make a difference because CRP will bind Plac promoter independent of cAMP level i.e. activator CRP will work even in high glucose concentration. If lactose is present then lac operon will always express so in option 'a & d' lac operon will express but in option 'b & c' it will not express.

3 0
3 years ago
Need help with this as soon as possible
NeX [460]

Answer:

1) What kind of organisms have this organelle?

->eukaryotic

2)What is the name of the organelle?

->mitochondria

3)Reactants

->oxygen, glucose

4)Products

->carbon dioxide, water, ATP

5)Energy source

->glucose

hope this helps :)

6 0
3 years ago
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baherus [9]
Question 10- a
Question 11- d
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2 years ago
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