BIOLOGY
PROTEINS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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DNA sequences contain information needed for cells to build proteins.
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Proteins are needed to carry out most of the functions of an organism’s cells.
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Since, cells only build proteins that are specifically encoded in their DNA, the function that a cell can carry out are depended on the DNA code
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DNA doesn’t affect cells functions
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Detailed explanation-1: -DNA’s unique structure enables the molecule to copy itself during cell division. When a cell prepares to divide, the DNA helix splits down the middle and becomes two single strands. These single strands serve as templates for building two new, double-stranded DNA molecules-each a replica of the original DNA molecule.
Detailed explanation-2: -The DNA sequence of a gene determine the amino acid sequence of the resulting protein. Thus any changes in DNA sequence can result in changes in protein function . This is called mutations. Mutations can be good, bad or neutral depending upon whether the effect of mutation is positive, negative or unnoticed.
Detailed explanation-3: -The flow of information from DNA to RNA to proteins is one of the fundamental principles of molecular biology. It is so important that it is sometimes called the “central dogma.” Through the processes of transcription and translation, information from genes is used to make proteins.
Detailed explanation-4: -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.