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olya-2409 [2.1K]
2 years ago
10

The hypothesis that, when life originated on Earth, a macromolecule other than DNA served in the role of information storage, an

d that this same macromolecule carried out catalysis, is called:
Biology
1 answer:
Andreas93 [3]2 years ago
4 0

Answer:

RNA world hypothesis.

Explanation:

RNA is present as the genetic material in some viruses only. RNA is produced from the template DNA by the process of transcription and helps in the protein gene expression.

According to RNA world hypothesis, RNA is considered to be the first genetic material as it has the ability to store the genetic material. The oxyribose sugar makes the RNA more reactive than the DNA molecule. The RNA also has the ability to work enzyme known as ribozyme. Hence, RNA has the ability to store the information and acts as catalyst.

Thus, the answer is RNA world hypothesis.

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The rate of a reaction catalyzed by an enzymes usually ________ with temperature; however, at temperatures above the optimum ran
oksano4ka [1.4K]

Answer:

increases; protein denaturation occurs

Explanation:

One of the characteristic of enzymes is the sensitivity to temperature .

Enzymes are sensitive to the changes in the environmental temperature.The enzymatic activities increases with increase in temperature,up to the optimum of 37 degrees in most animals.

However,once the optimum temperature has been exceeded,enzyme activities drops.This is because below optimum the rate of collision between the enzyme active sites and substrate molecules is very high,therefore more products are formed which increases the rate of reactions.

At temperature above the optimum,the high temperature  breaks the bonds,especially the hydrogen bonds holding the 3D structure of the active sites.Therefore,substrate molecules can not fit into the active site,and therefore enzymatic actives of the enzyme is affected,and the enzyme is said to be  denatured

4 0
3 years ago
Cigarette manufacturers purposefully add____ to cigarette in order to give them a particular flavour
jenyasd209 [6]
Manufacturers add sugars to their cigarette sometimes in the form of honey, etc. This makes cigarettes more enjoyable, particular and addictive in a way.


Hope it helped,

Happy homework/ study/ exam!
7 0
2 years ago
Homeostasis will be most affected by the removal of the
masya89 [10]
The removal of the cell membrane.

The membrane regulates homeostasis by letting "stuff" (general term) in and out of the cell.
6 0
3 years ago
How does natural selection lead to evolution?
Romashka-Z-Leto [24]
I believe that the answer is B.
3 0
3 years ago
Read 2 more answers
What would happen if a chemical interfered with the ability of RNA polymerase to bind to a DNA molecule
Helga [31]
Transcription would not take place and the protein would not be produced.
3 0
3 years ago
Read 2 more answers
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