Biochemistry 2280A Lecture : Transfer RNA

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orchidotter238

29 Dec 2011

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It brings the amino acid to the growing polypeptide chain. The guy that moves the amino acids around. 2d cloverleaf structure due to internal base pairing of the rna (single stranded; internally base pair) (stems and loops structure 4 stems and 3 loops. A clover leaf they always have complex secondary structures rna is known for internal base pairing. They also have non-conventional bases its not one of the regular ones (greek letter) trna usually have at least 1 of these; not that difficult from a regular base. These are modified bases; happens after the trna is made not transcribed as an alternate base enzyme that catalyzes the conversion of uridine to pseudouidine. 2 key single stranede reigions in rna which play crucial role in functino. 1. 3 acceptor site we have 3 end and that s what"s attached to amino acid.

Related Questions

3. Complementary base pairing is an essential feature of DNA replication and transcription and translation. Explain how.

4. Whatâs the significance of the fact that operator and promoter overlap?

5. In which direction (3â?5â or 5â?3â) does elongation of RNA occur?

6. In the genetic code, UUU and UUC both code for the same amino acid. What is this amino acid and what does this indicate about the genetic code?

7. Which part of a ribosome accepts a tRNA molecule that is attached to a growing polypeptide chain?

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If the bold term in each statement is correct hen write the letter C next to it. if the term is incorrect then replace it with the correct term.

The nucleotide bases found only in RNA and not in DNA is thymine.

The class of RNA molecules that carries the amino acids that are added to the growing polypeptide chain is tRNA.

During translation immediately after the first and second tRNA molecules become attached side by side on the mRNA., a hydrogen bond is formed between adjacent amino acids.

In the genetic code, 20 bases on the DNA code for a single amino acid.

The major lipid involved is transcription is RNA polymerase.

The one strand of DNA used as a template in the making of mRNA during transcription, is the template strand.

chocolatemuskrat416

1. A sequence of amino acids in a certain protein is found to be â Ser â Gly â Pro â Gly â

The sequence is most probably part of a(n):

a. beta turn

b. antiparallel beta sheet

c. alpha-helix

d. parallel beta-sheet

e. alapha-sheet

2. Which statement about peptides bonds is NOT TRUE?

There is perfectly free rotation about the peptide bond.

The peptide bond has partial double-bond character.

The peptide bond is shorter than a normal carbon-nitrogen single bond.

The peptide bond usually has a trans configuration with respect to the alpha-carbons of the two amino acids involved in the peptide bond.

Peptide bonds are made via condensation of an amine and a carboxylic acid with loss of water.

3. Which of the following statements about proteins is FALSE?

	Active proteins are generally very loosely structured.
	In water-soluble proteins, hydrophobic amino acid residues are generally buried and not exposed to water.
	Primary structure determines tertiary structure.
	Secondary structure is regular, recurring arrangements in space of nearby amino acid residues in a polypeptide.
	Quaternary structure involves the interaction of subunits in a protein with more than one polypeptide chain.

maroonwallaby335

Biochemistry 2280A Lecture : Transfer RNA

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