_____ Transcription into a polypeptide is the first step in the production of a
ID: 97821 • Letter: #
Question
_____ Transcription into a polypeptide is the first step in the production of a protein from the information in DNA. _____ A gene is a segment of DNA that specifies the sequence of mRNA transcription _____ DNA polymerase binds to a strand of DNA and moves along the strand to make more DNA. _____ Polypeptide (protein) synthesis occurs in the cytosol of a eukaryotic cell. _____ Genes can be transcribed when a repressor is binding on the operon _____ The genetic code is not universal in all organisms. _____ Genetic engineering can make plants toxic to insect pests that feed on the plants, and weeds that crowd out the plant respectively, but theoretically leave the plant harmless to humans. _____ The total amount of DNA in an organism, including all of its genes and other DNA is called the genome. _____ A protein that can cut DNA at specific DNA base sequences is a restriction enzyme. _____ Post-translational control of gene expression would be the removal of introns and alternative splicing of exons. _____ Translation of a gene involves initiation, elongation and termination using RNA polymers. _____ The process of passing gene information in the form of proteins from parent to offspring is called gene expression. If one strand of mRNA has the base sequence UUGCCAAAUGGU then the complement on the DNA would have the sequence a. TTGCCAAATGGT b. AACGGTTTACCA c. GGCUUTTTGCCG d. UGANDAUGAUGA A 30 nucleotide sequence (including a stop code) would have _____ in the polypeptide. a. 9 amino acids b. 12 amino acids c. 10 amino acids d. 11 amino acidsExplanation / Answer
The answers are
43. Ture
Two steps are there protein synthesis.
Step 1: Transcription - synthesis of RNA(mRNA) from DNA
Step 2: Translation - synthesis of polypeptide.
44. True.
Gene expression is different from protein expression. Some of the genes expression will be terminated with RNA sysnthesis. Eg. rRNA, tRNA genes.
45. True.
DNA polymease bind to template and systhesizes new strand. The newly synthesized DNA molecules composed with one old and one new strads.
46. True.
Step 1: Transcription - occurs in Nucleus
Step 2: Translation - occurs in cytosol.
47. False.
When repressor binds to operator, the RNA ploymease can not move on operon. HHense transcription will be stoped.
48. False
Genetic code is universal.
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