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Naya [18.7K]
3 years ago
10

1. Describe the structure and function of each of the three types of RNA.

Biology
1 answer:
Ket [755]3 years ago
6 0

Answer:

1.

mRNA - Messenger RNA: Encodes amino acid sequence of a polypeptide.

tRNA - Transfer RNA: Brings amino acids to ribosomes during translation.

rRNA - Ribosomal RNA: With ribosomal proteins, makes up the ribosomes, the organelles that translate the mRNA.

2.

Transcription is the process by which DNA is copied (transcribed) to mRNA, which carries the information needed for protein synthesis. Transcription takes place in two broad steps. First, pre-messenger RNA is formed, with the involvement of RNA polymerase enzymes.

3.

During translation, which is the second major step in gene expression, the mRNA is "read" according to the genetic code, which relates the DNA sequence to the amino acid sequence in proteins. Each group of three bases in mRNA constitutes a codon, and each codon specifies a particular amino acid (hence, it is a triplet code). The mRNA sequence is thus used as a template to assemble—in order—the chain of amino acids that form a protein.

Explanation:

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5 0
3 years ago
This chart Presents data on greenhouse omissions caused by human activity from 1990 to 2012 which questions will help clarify th
Dahasolnce [82]

Answer:

None of the questions asked can be answered completely from the graph provided 

Reason

1) Which source of electricity generation caused the most emissions?: The graph does provide the information of greenhouse gas emission from different sectors like electricity, transport, industry, agriculture, commercial and residential.  Electricity can be generated from several sources like hydrothermal, nuclear, etc. However, information of how these sources contributes towards greenhouse gas emission via electricity sector is not provided in graph

2) What types of industries are responsible for greenhouse gas emissions?: The graph does provides the information about total greenhouse gas emissions from industries. However, individual contribution from different types of industries cannot be answered.

3) Which natural sources of greenhouse gas emissions are shown here?: The graph provides information about greenhouse gases emission only due to human activity like electricity generation, agriculture, etc. and not from natural sources. 

4) Why is agriculture the largest source of greenhouse gas emissions?: The reason for largest emission of greenhouse gas due to agriculture cannot be answer from information provided.

5) What caused the dip in greenhouse gas emissions in transportation after 2007?: The reason for dip in greenhouse gas in transportation cannot be answer from information provided.

Read more on Brainly.com - brainly.com/question/10151442#readmore

Explanation:

6 0
3 years ago
Female gametophytes in angiosperms are hidden, and protected. Where are they found, and what are they also called?.
Scorpion4ik [409]

Answer:

They are usually found in the center and they are called embyro sacs.

Explanation:

3 0
2 years ago
1. When a horizontally positioned plant responds to gravity, (1 point)
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1-<span>auxins in the lower sides of stems cause cell elongation that bends the stem upright
2-</span><span>thigmotropism.
3-</span><span>phototropic and gravitropic
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5-</span><span>exposing the plant to a brief period of light in the middle of the night</span>
5 0
3 years ago
Read 2 more answers
If an organism has a high biological fitness in one environment ,does that mean that it would also have high biological fitness
dsp73

The answer is NO. This is because different environments require different adaptations. A desirable trait in one environment may be inconsequential or detrimental in another environment. This is the reason also why evolution is continuous as natural selection acts on traits of a population to ensure desirable traits are retained with changes in the environment in a dynamic world.






3 0
3 years ago
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