9. According the central dogma of molecular biology (carbohydrate,mRNA,DNA,prote
ID: 151296 • Letter: 9
Question
9. According the central dogma of molecular biology (carbohydrate,mRNA,DNA,protein is transcribed into (carbohydrate,mRNA,DNA,protein which is translated into (carbohydrate,mRNA,DNA,protein).
10.
Portions of eukaryotic mRNA sequence that are removed during RNA processing are called _____.
poly A tail
exons
introns
5' cap
11.
Which of the following is true about tRNA?
Different tRNA bind to different specific amino acids.
They have anticodon sequences that bind to the codons of mRNA.
They transfer amino acids to a growing polypeptide chain during protein synthesis.
All of the above.
12.
Which technique would use to make multiple copies of a piece of DNA?
DNA extraction
PCR (polymerase chain reaction)
electrophoresis
reproductive cloning
poly A tail
exons
introns
5' cap
11.
Which of the following is true about tRNA?
Different tRNA bind to different specific amino acids.
They have anticodon sequences that bind to the codons of mRNA.
They transfer amino acids to a growing polypeptide chain during protein synthesis.
All of the above.
12.
Which technique would use to make multiple copies of a piece of DNA?
DNA extraction
PCR (polymerase chain reaction)
electrophoresis
reproductive cloning
Explanation / Answer
9. Central Dogma: DNA ------ transcription -----> mRNA ----- translation---> proteins.
10. The introns are removed and the exons are expressed. Introns are non-coding sections of the mRNA.
11. All of the above options are true. tRNA act as bridges, matching a codon in mRNA with the amino acid it codes for.
12. PCR is a technique used to make multiple copies of DNA using primers. None of the other techniques is used as of now for making multiple copies of DNA.
Extraction: a process of purification of DNA.
Electrophoresis: used in the lab to separate charged molecules, like DNA, according to size.
Reproductive cloning: creating an animal that is genetically identical to a donor animal through somatic cell nuclear transfer.
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