LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The DNA sequence codes for the order of the amino acids found in a protein. Each of the 20 amino acids have different chemical properties and polarities. If the DNA sequence is changed due to a mutation, this causes the order of the amino acids in the protein to change. This causes the overall shape and therefore function of the protein to change. This change in protein structure can cause phenotypic changes.
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the phenotype is controlled by random chance. So it can randomly be changed at any time.
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The photosynthesis of plants, change how our genes line up when we eat them., This change causes a vast array of phyotypical combinations. This shows that we could have many different and new genes expressed every day.
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It is due to the processes of transcription and transduction.
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Detailed explanation-1: -Transformation, or DNA-mediated gene transfer, permits the introduction of new genetic information into a cell and frequently results in a change in phenotype.
Detailed explanation-2: -Which of the following statements best describes how a mutation changes the shape of a protein? If a mutation occurs during DNA replication, the affected gene may produce a protein that is misfolded.
Detailed explanation-3: -A mutation is a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.
Detailed explanation-4: -DNA codes for phenotype by sequences spec-ifying proteins and RNAs and by regulatory elements that control when and by how much of each is made. Variation in DNA sequence can translate into variation in phenotype, which may cause fitness differences among individuals on which natural selection can act.