BIOA01H3 Lecture Notes - Lecture 34: Ribosomal Rna, Transfer Rna, Acylation

14 views3 pages

viridianworm635

12 Jun 2016

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

3363410481 and 37710 others unlocked

BIOA01H3 Full Course Notes

Verified Note

18 documents

Document Summary

Slide 2: mrna gets translated into amino acid chain. Slide 4: euk: rna has to be process, then sent to ribosome where translation occur. Pro: there is no nucleus, therefore can be translated right after transcription. Slide 5: rna translated into amino acid (into codons) Slide 6: translation, is mrna directed protein synthesis polypeptide. Ribosome take the info from the mrna and translated into amino acid. Slide 7: mrna read from5" to 3" trna read codon and introduces next amino acid to be added stop uaa, uag polypeptide made from n-terminal to c-terminal end; first amino acid is met. Slide 9: trna transfer rna single strand rna doesn"t get translated interact with themselves and forma piece of double stranded bottom end of trna contains anticodon sequence that pairs with codon in mrnas. 64 codons and 3 is stop codon and 61 is amino acids. First and second nucleotides do anticodon and codon must match exactly.

Related Questions

Please please please I reallly need help with the following 5 questions.

Question 1

Which of the following is responsible for directing the prokaryotic ribosome to the +1 start site:

	a.	the 3' UTR
	b.	the AUG codon
	c.	Kozak sequence
	d.	Okasaki fragment
	e.	Shine Dalgarno sequence

Question 2

In translation, mRNAs are READ in the:

	a.	5' to 3' direction and polypeptide chains are synthesized amino to the carboxyl ends
	b.	5' to 3' direction and polypeptide chains are synthesized carboxyl to the amino ends
	c.	3' to 5' direction and polypeptide chains are synthesized carboxyl to the amino ends
	d.	3' to 5' direction and polypeptide chains are synthesized amino to the carboxyl ends

Question 3

Which of the following terms describes a tRNA to which an amino acid has been added:

	a.	charged tRNA
	b.	activated tRNA
	c.	stimulated tRNA
	d.	hydrolyzed tRNA

Question 4

The ability of some tRNA to recognize more than one codon in mRNA is explained by which of the following:

	a.	a reading frameshift
	b.	a reading mistake
	c.	Redundancy Theory
	d.	Wobble Hypothesis

Question 5

One essential component in eukaryotic mRNAs recognized by translation initiation factors is the

	a.	TATA box
	b.	AUG initiation codon
	c.	7-methylguanosine cap
	d.	Shine-Dalgarno sequence

blackporcupine6

Fill in the blank. Elongation during translation does NOT involve ____________.

Question 16 options:

	the translation of codons according to the genetic code
	the formation of bonds catalyzed by the ribosome
	complementary base pairing between RNA molecules
	amino acids being linked together in a polypeptide
	reading the DNA template 3' to 5'

For a given gene, what establishes the reading frame for translation?

Question 17 options:

	the location of the enhancer relative to the gene
	the first three nucleotides at the 5' end of the mRNA
	the first three nucleotides at the 3' end of the mRNA
	the start codon in the mRNA
	the location of the promoter relative to the gene

Which of the following is the LEAST likely direct consequence of a substitution mutation?

Question 18 options:

	changing the length of a protein coded for by a gene
	changing one amino acid in a protein
	creating a stop codon
	eliminating a start codon
	changing the length of the DNA molecule containing a gene

Suppose that the pre-mRNA transcript from a eukaryotic gene is 30,000 nucleotides long, and the gene codes for a sequence of 300 amino acids. What is the best explanation for the relationship between these numbers?

Question 19 options:

	only the first 900 nucleotides of the pre-mRNA transcript are translated
	it takes 100 nucleotides to specify a single amino acid
	300 of the nucleotides in the transcript are important, and the rest are "junk"
	only the last 900 nucleotides of the pre-mRNA transcript are translated
	large portions of pre-mRNA transcripts are cut out during RNA processing

Suppose an individual is born into a population with a novel mutation. Is the new mutation an evolutionary change, and why?

Question 20 options:

	no, because it is not a big enough change to count
	yes, because new mutations are always adaptive
	yes, because the appearance of a new genetic variant is a genetic change in a population
	no, because not enough individuals have the mutation for it to matter
	no, because most mutations are not adaptive

QUESTION 1

Each triplet codon encodes for a unique amino acid

True

False

QUESTION 2

The codon and anticodon are always antiparallel to each other when base-paired.

True

False

QUESTION 3

Which one of these is not a stop codon:

	(a)	UAA
	(b)	UAG
		(c) UAC
		(d) UGA

QUESTION 4

In Prokaryotic translation which of the following occurs:

		a) the 50S ribosome joins with the 60S initiation complex to allow for initiation
		b) The AUG is identified by being 20 nucleotides downstream of the shine-dalgarno sequence
		c) GTP is hydrolyzed as initiation factors are released
		d) A 45S initiation complex is formed by numerous factors, including mRNA

QUESTION 5

The extended polypeptide chain occurs in the E site in the ribosome

True

False

coffeeswan749

BIOA01H3 Lecture Notes - Lecture 34: Ribosomal Rna, Transfer Rna, Acylation

BIOA01H3 Full Course Notes

Document Summary

Get access

Related Documents

BIOA01H3 Lecture Notes - Lecture 31: Stop Codon, Eukaryotic Translation, Start Codon

BIOA01H3 Lecture Notes - Lecture 34: Endoplasmic Reticulum, Aminoacylation, Inosine

BIOA01H3 Lecture Notes - Dna Replication, Galactoside, Human Genome Project

Related Questions