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goldfiish [28.3K]
3 years ago
6

The suns energy is classified by the

Biology
2 answers:
Travka [436]3 years ago
6 0
Nuclear fusion occurs in the core area or centre of the Sun. Here, temperatures are around 15,000,000°C. Gravity pulls all of the mass of the Sun inwards, creating pressure so intense that nuclear reactions take place. The nuclei of hydrogen atoms smash together and fuse to form larger atoms such as helium nuclei.
Zigmanuir [339]3 years ago
4 0
<span>Nuclear fusion occurs in the core area or centre of the Sun</span>
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Which is a scientific question?
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Explain the difference between bactericidal and bacteriostatic antibiotics.
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Explanation:

The bacteriostatic antibiotics can be defined as those antibiotics, which prevents the growth of bacteria. These keeps the growth of bacteria in the stationary phase so that bacteria cannot cause harm to the host.

The bactericidal antibiotics can be defined as those antibiotics, which kills the bacteria.

The example of bacteriostatic antibiotic is Tetracycline  that it inhibit the bacteria ribosome production of proteins. This way bacterial growth and reproduction will get restricted.

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Distilled water has a pH of 7. Milk has a pH of 6. Therefore, milk is: A. 10 times less acidic than distilled water. B. half as
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(C) 10 times more acidic than distilled water.

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1.Why do organisms do Meiosis?
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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
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