Biology 1202B Lecture Notes - Release Factor, Alternative Splicing, Protein Targeting

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ochrebee715

30 Apr 2012

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Structure of rna: about 80% rna in a cell is rrna (ribosomal) rrna-protein complexes = where translation occurs. Each subunit is made of rrna and ribosomal proteins: mrna template for translation. Any errors in mrna will affect the protein you make trna (transfer rna) . Attached to 3" end is an amino acid specific to the anticodon distinctive. Internal anticodon sequence is complementary to mrna codon structure. Non-watson and crick bindings - there are some unusual bindings in trna. This gives it some wiggle room when binding they have room to move trna and mrna bind in an antiparallel manner: there are 3 sites in the rrna-protein complex. A site = aminoacyl site trna"s seek out the e, p and a sites. Translation using mrna to create polypeptide chains (long amino acid chains: 3 stages of translation. Met-trna with gtp bound to it and the small ribosomal subunit form a complex.

Related Questions

Q1-Can ribosomes synthesize any type of protein?

Q2-The code on the mRNA *a codon) is matched to corresponding letters on the tRNA (an anticodon). Based on what you know about nucleotide structure, what type of bond is responsible for complementary base pairing between the mRNA codon and the tRNA anticodon?

beigegoat3

RNA has many different roles in gene expression. Check all thatapply.

mRNA defines the polypeptide to be formed

DNA defines the polypeptide to be formed

rRNA, along with proteins, forms the ribosome

mRNA delivers the appropriate amino acid to the ribosome

tRNA delivers the appropriate amino acid to the ribosome

Translation is appropriately named because the process transfersthe code from DNA to RNA, though in complementary fashion.

True

False

The template strand is to the sense strand as the coding strandis to the antisense strand.

True

False

The phenomenon symbolized by DNA â RNA â Protein is referred toas the Central Dogma because it is true for all organisms.

True

False

The reading frame refers to the selection of the correct tripletof nucleotides by selecting the correct beginning point. If thebeginning point is wrong, all nucleotides will be clustered intothe wrong codons.

True

False

Activating enzymes need to recognize only one anticodon.

True

False

coffeehorse275

1. DNA, or the instructions for making proteins, is found within the _____ of the cell; while protein synthesis machinery is found in the _____ of the cell.

nucleus; cytoplasm

nucleolus; nucleus

cytoplasm;nucleus

nucleus; plasma membrane

2.During transcription, double stranded DNA is transcribed into a complementary molecule of

single-stranded DNA.

double-stranded DNA.

single-stranded mRNA.

single-stranded tRNA.

15. Place the following steps in the order in which they occur during gene expression.

mRNA is carried to ribosomes in the cytoplasm, DNA is transcribed into mRNA in the nucleus, mRNA is translated into polypeptides by tRNA

mRNA is carried to ribosomes in the cytoplasm, mRNA is translated into polypeptides by tRNA, DNA is transcribed into mRNA in the nucleus

DNA is transcribed into mRNA in the nucleus, mRNA is translated into polypeptides by tRNA, mRNA is carried to ribosomes in the cytoplasm

DNA is transcribed into mRNA in the nucleus, mRNA is carried to ribosomes in the cytoplasm, mRNA is translated into polypeptides by tRNA

Biology 1202B Lecture Notes - Release Factor, Alternative Splicing, Protein Targeting

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