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aliina [53]
3 years ago
11

All of the following statements about enzymes are true, except: a. They increase the rate of a reaction. b. They function in an

aqueous environment. c. A single enzyme typically reacts with many different substrates. d. They lower the activation energy of a reaction.
Biology
1 answer:
tekilochka [14]3 years ago
7 0

Answer:

c. A single enzyme typically reacts with many different substrates.

Explanation:

Enzymes are proteins that have catalytic activity and they are specific. This means that a single enzyme has only one specific substrate. They act as a "lock and key" complex, so one substrate activates to one enzyme.

Also, enzymes accelerate the rate of a reaction by lowering its activation energy. Finally, they can act in an aqueous environment, so the answer is c.

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Answer:

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3 years ago
In prokaryotes, how does the length of a typical monocistronic mRNA compare to the length of the protein generated from this mRN
Nastasia [14]

1. The correct answer is: a. There are more mRNA bases than amino acids.

The transcription of monocistronic mRNA in prokaryotes is a rare process (it is more characteristic for the eukaryotes). Monocistronic mRNA is RNA, which encodes for only one or specific protein. Three bases of mRNA encode one amino acid of protein, thus it has more bases than amino acids of the final product, protein.  

2. The correct statements are:  

The mRNA contains 5' and 3' untranslated regions.

The stop codon does not code for an amino acid.

The start site of transcription is upstream of the start codon.

Each codon contains 3 RNA bases.

All of these approve that more bases are in mRNA since not all of them are translated into amin oacids.

Other statements are hallmarks of eukaryotic RNA processing, and therefore not relevant to prokaryotes.

5 0
3 years ago
Which is a characteristic of pseudoscience facts
Jobisdone [24]

<em>Contradictory claims made by some experts</em><em> is a characteristic of Pseudoscience fact.</em>

<u>EXPLANATION: </u>

Pseudoscience is characterized by contradictory claims that are said to be scientific, but they are not compatible with scientific methods. They are the statements or beliefs that are usually not open for evaluation by other experts.

Also, these are not studied facts which means there is a lack of evidence to support them scientifically. These beliefs are also very resistant to change. For example, Astrology is a Pseudoscience. Other examples are theories related to Bermuda Triangle, Ancient Aliens, etc.

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3 years ago
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