AP Biology : Translation
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Example Question #11 : Understanding Ribosomes, T Rna, And Anti Codons
Proteins that will be secreted outside of the plasma membrane of the cell are translated from ribosomes found __________.
on the smooth endoplasmic reticulum
in the nucleus
on the plasma membrane
on the rough endoplasmic reticulum
in the cytosol
on the rough endoplasmic reticulum
When translated from a ribosome on the rough endoplasmic reticulum (RER), the protein is moved through the RER until it is released in a lipid vesicle that can transport the protein to the plasma membrane, where the lipid vesicle fuses with the lipid membrane and the protein is secreted outside the cell. Smooth endoplasmic reticulum does not have ribosomes on it and is used for the production and transport of lipids and in detoxification. No ribosomes are found in the nucleus or directly on the plasma membrane. Ribosomes in the cytosol translate proteins that stay inside the cell.
Example Question #113 : Dna, Rna, And Proteins
In messenger RNA, each codon specifies a particular __________.
amino acid
nucleotide
pyrimidine
purine
amino acid
In messenger RNA, each codon is three nucleotides that codes for a particular amino acid during translation. Purines and pyrimidines are types of nucleotides on DNA and RNA. The genetic code is redundant, but each codon only codes for one amino acid.
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