Transcription and Splicing

Question 1

what is mRNA?

Answer 1

the RNA molecule which is used to transfer the genetic code from the nucleus to the cytoplasm (complementary to the DNA it codes for)

Question 2

what is tRNA?

Answer 2

the RNA molecule involved in carrying the amino acids to the ribosome , a single polynucleotide folded into the shape of a clover

Question 3

What enzyme unwinds DNA allowing for transcription by breaking the hydrogen bonds

Answer 3

DNA Helicase

Question 4

What enzyme joins the complementary nucleotides from the template DNA to the template strand forming pre-mRNA

Answer 4

RNA Polymerase

Question 5

What are Introns?

Answer 5

non-coding sequences within genes

Question 6

What are Exons?

Answer 6

the parts of genes that code for amino acids

Question 7

what is splicing?

Answer 7

The process of removing the introns from the gene to be left with the amino acid coding Exons

Question 8

what is missense base substitution?

Answer 8

One codon is mutated into another

Question 9

What is nonsense base substitution?

Answer 9

New codon is a stop codon and translation ends at the site of mutation