AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Where in the cell does the second step of protein synthesis occur?
A
in the DNA
B
in the nucleus
C
in the Golgi Apparatus
D
at the ribosome
Explanation: 

Detailed explanation-1: -The first step involves synthesizing messenger RNA (mRNA), which then leaves the nucleus and travels into the cytoplasm where it attaches to a ribosome. At this point, the second step of translation begins where the genetic code of the mRNA molecule is read and used to create a specific protein molecule.

Detailed explanation-2: -Translation, the second step in getting from a gene to a protein, takes place in the cytoplasm. The mRNA interacts with a specialized complex called a ribosome, which “reads” the sequence of mRNA nucleotides. Each sequence of three nucleotides, called a codon, usually codes for one particular amino acid.

Detailed explanation-3: -In the second step of protein synthesis-translation-tRNA and mRNA interact to code amino acids into growing polypeptide chains.

Detailed explanation-4: -Translation occurs at the ribosome, which consists of rRNA and proteins. In translation, the instructions in mRNA are read, and tRNA brings the correct sequence of amino acids to the ribosome.

Detailed explanation-5: -The location in which protein synthesis occurs in a cell is both in the nucleus and the cytoplasm. RNA is transcribed in the nucleus from a DNA template. This RNA then moves to the cytoplasm where the translation is undertaken. It is here in the cytoplasm that the mRNA is read, and a protein is formed.

There is 1 question to complete.