LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

MOLECULAR BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Describe how the processes of transcription and translation lead to the synthesis of the body’s proteins.
A
during transcription, the DNA template strand is used a pattern for building a molecule of mRNA. The mRNA molecule leaves the nucleus and attaches to a ribosome. During translation, the ribosomes use the sequence of nitrogenous bases contained in the mRNA as code for assembling a chain of amino acids. Several of the polypeptide chains are combined to form a protein.
B
during translation the DNA template strand is used a pattern for building a molecule of mRNA. The mRNA molecule leaves the nucleus and attaches to a ribosome. During transcription, the ribosomes use the sequence of nitrogenous bases contained in the mRNA as code for assembling a chain of amino acids. Several of the polypeptide chains are combined to form a protein.
C
Different amino acids have different polarities. The change in the amino acid sequence thus causes a change in the overall shape of the protein. Since structure largely determines function, the changed protein doesn’t function correctly.
D
I have no clue
Explanation: 

Detailed explanation-1: -During transcription, DNA is used as a template to make a molecule of messenger RNA ( mRNA ). The molecule of mRNA then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. During translation, the genetic code in mRNA is read and used to make a polypeptide.

Detailed explanation-2: -The eukaryotic nucleus therefore provides a distinct compartment within the cell, allowing transcription and splicing to proceed prior to the beginning of translation. Thus, in eukaryotes, while transcription occurs in the nucleus, translation occurs in the cytoplasm.

Detailed explanation-3: -Transcription uses a strand of DNA as a template to build a molecule called RNA. The RNA molecule is the link between DNA and the production of proteins. During translation, the RNA molecule created in the transcription process delivers information from the DNA to the protein-building machines.

There is 1 question to complete.