PATHOLOGY MCQ
CELL DAMAGE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Triplets, a group of three nucleotides, create a code for a specific amino acid. These amino acids are combined into chains to form proteins.
|
|
|
Nitrogen bases in the DNA strand recombine into amino acids chains.
|
|
|
Mutations within a set of nucleotides create variations in genetic coding. These variations are vital to consistent protein synthesis.
|
|
|
All of the above
|
Detailed explanation-1: -Information in DNA is carried in sequences of genetic code. How are these genetic codes translated into specific proteins that carry out functions with the organism? Triplets, a group of three nucleotides, create a code for a specific amino acid. These amino acids are combined into chains to form proteins.
Detailed explanation-2: -To manufacture protein molecules, a cell must first transfer information from DNA to mRNA through the process of transcription. Then, a process called translation uses this mRNA as a template for protein assembly.
Detailed explanation-3: -Genetic Code Each gene’s code uses the four nucleotide bases of DNA: adenine (A), cytosine (C), guanine (G) and thymine (T)-in various ways to spell out three-letter “codons” that specify which amino acid is needed at each position within a protein.
Detailed explanation-4: -In transcription, the information in the DNA of every cell is converted into small, portable RNA messages. During translation, these messages travel from where the DNA is in the cell nucleus to the ribosomes where they are ‘read’ to make specific proteins.
Detailed explanation-5: -The mRNA is then pulled through the ribosome; as its codons encounter the ribosome’s active site, the mRNA nucleotide sequence is translated into an amino acid sequence using the tRNAs as adaptors to add each amino acid in the correct sequence to the end of the growing polypeptide chain.