Answer: C. magma
Explanation: This molten rock is called magma. Molten rock that reaches Earth's surface is called lava. An igneous rock is classified on the basis of its mineral composition and the size of its mineral crystals. A rock formed from magma can have the same composition as a rock formed from lava.
ball and socket model.
amino acid chain model.
the lock and key model.
double helix model.
Answer:
the lock and key model.
Explanation:
The reason why this model for enzymes is called as lock and key model is because like a specific key fits into a particular lock meant for only that key, in a similar way a substrate also fits in an enzyme active site which is specifically meant for that particular substrate only.
Enzymes are very specific for their substrates and only a substrate which has a particular shape corresponding to the active site of that enzyme can get inside the enzyme for catalysis.
This model is extremely useful for blocking enzymatic activities. In order to block the enzyme we can use a structural analogue of that enzyme which rather than getting converted into products inhibits the enzyme and restricts its activity.
For example: Cholesterol biosynthesis can be restricted easily by using statin drugs which are structural analogues of HMG CoA. Statins bind HMG CoA reductase and stop its structural analogue which is HMG CoA from binding this enzyme. By doing this HMG CoA is not converted into mevalonate and hence cholesterol biosynthesis is halted.
Answer:
the lock and key model is the answer
Explanation:
Enzyme has a pre-determined shape for the active site
Only substrate of specific shape can bind with active site
Substrate contact with enzyme will change the shape of the active site
Allows small change in space to accommodate substrate
B. liquid or gas
C. gas or solid
D. liquid, gas, or solid
D. liquid, gas, or solid
b. No, because mutations are caused by exposure to harmful radiation.
c. Yes, because a mutation can help an organism survive in a particular environment.
d. Yes, because a mutation can give an organism what it needs to survive.
Can a mutation be beneficial to an organism?
Yes. The benefit of a mutation can help it survive in a particular environment.
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Answer:
Seepage; runoff
Explanation:
In nature, water is constantly circling: from the water surfaces it evaporates, travels up in the atmosphere, there it condensates, forms clouds, and then again falls to the land and water surfaces. This cycle has been going on for thousands and thousands of years and is known as the water cycle.
Now, the real question is how does the water, fallen from the clouds, on the land, travel back to the oceans.
Soil consists of multiple layers, some are water permeable, and some are not. When water (rain) reaches the soil, through tiny pores in upper permeable layers it will travel downward, deeper and deeper. This process is called the seepage. Upon reaching the water-impermeable layers, it stops, becoming part of what is known the underground water. It will continue to flow on this layer until it finds its way back on the surface, usually in a form of a spring, which will find its way to a river, and river will take that water to a sea or an ocean.
However, if the soil is to saturated with water, especially during long rainy, stormy period, or in the spring, after the snow melts. This excess water will, because of the gravity, flow over the earth's surface, from higher (mountains) to lower (valley) areas, making its way to some valley river, which will take it further to a sea or an ocean.
Upon reaching the ocean, this land-water can again join the water cycle, again and again.
B. old-school politician
C. Washington insider
D. Washington outsider