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Vladimir [108]
3 years ago
6

Who developed the modern model of the solar nebular disk instability model?

Biology
2 answers:
Varvara68 [4.7K]3 years ago
4 0
It would be traced to victor safronov 
Oksanka [162]3 years ago
3 0

Answer:

George Wetherill and Victor Safronov

Explanation:

The modern model known as "solar nebular disk instability model" was developed by George Wetherill after refining the basic modern model developed by  Russian astronomer Victor Safronov in 1970.  According to this model, dust and gases resulted into massive clumps during the early stage of formation of solar system. This model well explains the formation of star, sun, solar system, planet, asteroids and comets.

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The first glycolysis rate-limiting enzyme is under various allosteric regulations. This protein is nearly inactive because of in
navik [9.2K]

Answer:

d. ATP;  Fructose-2,6-bisphosphate

Explanation:

Phosphofructokinase-1 is the enzyme that catalyzes the formation of fructose-1,6-bisphosphate from fructose-6-phosphate and ATP. The phosphofructokinase step is the first rate-limiting step of glycolysis.

Phosphofructokinase-1 activity is allosterically regulated. Its activity is increased whenever the cell's ATP supply is depleted or when its breakdown products, ADP and AMP accuulates in he cell. However, it is inhibited when the cell is amply supplied with ATP.

The activity of phosphofructokinase-1 is restored by fructose-2,6-bisphosphate, its most potent activator.

From the given options:

a. AMP :::: citrate  is wrong because AMP increases the activity of phosphofructokinase-1 and citrate is not its activator but an inhibitor

b. AMP :::: Fru-2,6-P2  is wrong because AMP increases its activity same as fructose-2,6-bisphosphate

c. ATP :::: citrate  is wrong because both citrate and ATP are inhibitors

d. ATP :::: Fru-2,6-P2  is correct as explained above

e. All of these is wrong because of the other wrong options above.

6 0
3 years ago
true or false a scientist opinion is a valid source of information to use in a scientific investigation?
dedylja [7]
False because it's an "OPINION" not a FACT.
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3 years ago
What peculiar feature did Darwin find in the tortoises on the Galapagos Islands?
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They were gigantic. Way bigger than a normal toroise
3 0
3 years ago
Which of the following organisms are photosynthetic autotrophs? Select all that apply.
Novosadov [1.4K]

(A)Algae

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6 0
3 years ago
Read 2 more answers
Why is mitosis important to organisms?
KATRIN_1 [288]

Answer:

I think it would be because In unicellular organisms such as bacteria, mitosis helps in asexual reproduction as it produces an identical copy of the parent cell. ... In the case of multicellular organisms, mitosis helps in growth and repair by producing more number of identical cells

Explanation:

3 0
3 years ago
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