AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How is information for a specific protein carried on the DNA molecule?
A
As a pattern of phosphate and sugars
B
In the double helix shape of the condensed chromosome
C
As a sequence of nucleotides
D
In the ratio of adenine to guanine
Explanation: 

Detailed explanation-1: -DNA molecules undergo a process called transcription to code for codons on mRNA strand. These codons tend to pair with tRNA molecule which holds the amino acids. The amino acids will then form a chain in the sequence of DNA nucleotides to result in protein formation.

Detailed explanation-2: -The type of RNA that contains the information for making a protein is called messenger RNA (mRNA) because it carries the information, or message, from the DNA out of the nucleus into the cytoplasm. Translation, the second step in getting from a gene to a protein, takes place in the cytoplasm.

Detailed explanation-3: -Definition. Gene expression is the process by which the information encoded in a gene is turned into a function. This mostly occurs via the transcription of RNA molecules that code for proteins or non-coding RNA molecules that serve other functions.

Detailed explanation-4: -Genetic Code: The sequence of nucleotides, coded in triplets (codons) along the mRNA, that determines the sequence of amino acids in protein synthesis. A gene’s DNA sequence can be used to predict the mRNA sequence, and the genetic code can in turn be used to predict the amino acid sequence.

There is 1 question to complete.