Please help explain why the following are false 1. Introns are degraded in the c

Question

Please help explain why the following are false

1. Introns are degraded in the cytoplasm.

2. All information about the amino acid sequence of a polypeptide resides in the gene that encodes it.

3. The spliceosome is a large, ribonucleoprotein complex located in the cytoplasm.

4. All eukaryotic genes contain an intron.

5. Mitochondrial and chloroplast genes do not contain introns.

6. Introns contain no sequence-specific information.

7. The poly(A) tails on mRNA molecules are transcribed from DNA templates.

Explanation / Answer

Answer:

1. Introns are degraded in the cytoplasm. (false).

Introns are degrade in the nucleus.

2. All information about the amino acid sequence of a polypeptide resides in the gene that encodes it. (False)

Translation is the creation of polypeptides (amino acids bound in sequence) and therefore of proteins based on information encoded in the mRNA molecule.

3. The spliceosome is a large, ribonucleoprotein complex located in the cytoplasm. (false)

The spliceosomes present in the nucleus

4. All eukaryotic genes contain an intron. (Fslde)

Introns are present in most genes of complex eukaryotes, although they are not universal. Almost all histone genes, for example, lack introns, so introns are clearly not required for gene function in eukaryotic cells.

5. Mitochondrial and chloroplast genes do not contain introns. (false).

They also have intron.

6. Introns contain no sequence-specific information. (false)

7. The poly(A) tails on mRNA molecules are transcribed from DNA templates (false)

The poly(A) tail consists of multiple adenosine monophosphates; in other words, it is a stretch of RNA that has only adenine bases.

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