DHN 311 Final Exam Tested Questions Reviewed And Revised With Correct Answers Already Passed!!
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Course
DHN 311
Institution
DHN 311
DHN 311 Final Exam Tested
Questions Reviewed And Revised
With Correct Answers
Already Passed!!
1. What is a SNP? - ANSWER - Single nucleotide polymorphism - Most common type of genetic variation/polymorphism - Each SNP represents a difference in a single DNA nucleotide
2. What is RNA...
DHN 311 Final Exam Tested
Questions Reviewed And Revised
With Correct Answers
Already Passed!!
1. What is a SNP? - ANSWER - Single nucleotide polymorphism
- Most common type of genetic variation/polymorphism
- Each SNP represents a difference in a single DNA nucleotide
2. What is RNA splicing? - ANSWER - Splicing is when introns are taken out
and exons are joined together to form mature RNA
3. Describe the role of each type of RNA - ANSWER - Transfer RNA (tRNA) -
transfers amino acids to the ribosomes to attach to growing peptide chains to
form a protein
- Ribosomal RNA (rRNA) - Serves as the site for protein synthesis
- Messenger RNA (mRNA) - translated into sequences of amino acids
4. When do post and co-translational modifications occur? - ANSWER - Co-
translational - occur while polypeptide chains are still attached to the ribosome
(covalently modified)
- Post-translational - occur after RNA synthesis has been completed (covalently
modified)
,5. What are the two products of gene expression? - ANSWER RNA or protein
6. What are the functions of DNA polymerase? - ANSWER - Makes DNA from
nucleotides, the building blocks of DNA (copies the DNA by unwinding the double
helix at the replication fork)
- Proofread DNA
- Make corrections and repairs
7. Nutrigenomics - ANSWER - The study of the effect of specific nutrients, or
other bioactive dietary compounds, on the expression of genes (ex: Saturated fats
increase LDL cholesterol levels)
- How the food you eat influences your gene expression
8. Nutrigenetics - ANSWER - The study of how variations in genes may
increase or decrease the body's need for a specific nutrient or other bioactive
food compounds (ex: saturated fat increases LDL cholesterol in one person x5, but
only x2 in a different person)
- It is the genes that you already have influencing the food that you should or
shouldn't eat
9. Epigenetics - ANSWER - The influence of environment/lifestyle (diet), age
and disease conditions on changes in gene expression without changing the DNA
sequence ("above genetics")
- Heritable; can be passed down to next generations
10. What are the proteins called that bind to distinct sites on DNA that controls
DNA transcription to RNA? - ANSWER Transcription Factors
13. Tertiary structure bonds - ANSWER -Covalent peptide bonds between
amino acids
- Hydrogen bonds
- Disulfide bridges
- Ionic bonds between charged R-groups
- Hydrophobic interactions (hydrophobic R-groups arrange themselves towards
the inside)
14. Quaternary structure bonds - ANSWER - Quaternary structure arises from
the bonding of 2+ proteins
- Same bonds that are found in tertiary structure
15. At which level of protein folding do the side chains (R) interact? - ANSWER
Tertiary
16. What are the different functions of proteins in the body? - ANSWER -
Structure
- Movement
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