Biology 1202B Lecture Notes - Lecture 6: Stop Codon, Start Codon, Eukaryotic Transcription

18 views16 pages

lavenderturtle419

25 May 2016

School

Department

Course

Professor

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

Document Summary

A region of dna which is transcribed. Gene transcription is a highly regulated process- genes are only turned on when necessary. The dna alphabet consists of 4 letters: a, t, c, and g. The rna alphabet consists of 4 letters: a, u, c, and g. T in dna, is equivalent to u in rna. Genetic code: the nucleotide information that specifies the amino acid sequence of a polypeptide. Codon: each three letter triplet of the genetic code. These researchers found that short, artificial mrnas of codon length three nucleotides could bind to ribosomes in a test tube and cause a single transfer rna (trna), with its linked amino acid, to bind to the ribosome. Nirenberg and leder then made 64 of the short mrnas, each consisting of a different, single codon. They added the mrnas, one at a time, to a mixture in a test tube containing ribosomes and all the different trnas, each linked to its own amino acid.

Related Questions

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. _________________________ is the name of the process that produces proteins using RNA molecules.

a.Transcription

b Translation

c. Replication

d. Mutagenesis

2. The peptide bonding site on the ribosome:

a. A site

b. P site

c. E site

d. D site

3. The name given to the bond formed between two amino acids.

a. Hydrogen bond

b. Double bond

c. Peptide bond

d. Negative bond

4. __________________________ is the movement of the mRNA molecule on the ribosome to open up the A-site for the new incoming amino acid.

a. Transformation

b. Mutation

c. Translocation

d. Initiation

5. What does the term semi-conservative mean.

a. Replication of RNA is semi-conservative, each new strand consists of one old strand of RNA and one new strand of RNA.

b. Replication of DNA is semi-conservative, each new strand consists of one old strand of DNA and one new strand of DNA.

c. Replication of DNA is semi-conservative, each new strand consists of new strands of nucleotides.

d. Transcription of RNA is semi conservative.

6. This molecule functions during protein synthesis to recognize the codon and bring the proper amino acid back to the ribosome for translation.

a. mRNA

b. tRNA

c. rRNA

d. DNA polymerase

7. What is meant by the base-pairing rule.

a. Bases on a single strand of DNA are always found as pairs

b. Adenine always base pairs with guanine; cytosine with thymine

c. Adenine always base pairs with thymine; cytosine with guanine

d. Bases on a single strand of RNA are found in pair.

8. In this step of protein synthesis, amino acids are added to a growing polypeptide chain.

a. Initiation.

b. Elongation.

c. Termination.

d. Transpiration.

9. Three complementary bases found in a mRNA are called ____________________.

a. Anti-codon.

b. Triplet.

c. Doublet.

d. Codons.

10. Which statement best describes the job or function of the messenger RNA.

a. Carries the map of the gene sequence in the form of codons to the cytoplasm

for translation of the protein.

b. It transfers amino acids to the ribosome for protein synthesis.

c. It forms the ribosomes.

d. It helps replicate DNA.

ceruleangnat663

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?

brownmammoth184

Biology 1202B Lecture Notes - Lecture 6: Stop Codon, Start Codon, Eukaryotic Transcription

Document Summary

Get access

Related Documents

Biology 1202B Chapter Notes - Chapter 13: Small Nuclear Rna, Start Codon, Alternative Splicing

Biology 1202B Lecture Notes - Lecture 2: Reverse Transcriptase, Sister Chromatids, Mitosis

Biology 1202B Lecture Notes - Lecture 13: Rna Polymerase Ii, Rna Polymerase Iii, Rna Polymerase I

Related Questions