Which is NOT a true statement: Whereas mitosis results in diploid daughter cells

Question

Which is NOT a true statement: Whereas mitosis results in diploid daughter cells; meiosis results in haploid gametes. Whereas mitosis results in identical daughter cells, meiosis results in cells that are genetically unique. Unlike mitosis, in meiosis I, homologous chromosomes (tetrads) line-up during metaphase. Crossing-over takes place in Prophase l of meiosis and Prophase ll of mitosis. None of the above (All of the statements are true) (Ch. 11, DNA Biology & Recombinant DNA technology) True/False In eukaryotes, transcription occurs in the nucleoid. (T/F) Chargaff's rules state that the amount of DNA base pairs (G:C and A:T) varies from species to species. (T/F) The only difference between DNA and RNA is that DNA contains deoxyribose instead of ribose. (T/F) Gene expression can be regulated by post-transcriptional RNA editing/processing. (T/F) Gene expression can be regulated at the level of protein synthesis. (T/F) Three types of RNA (mRNA, rRNA, and tRNA) are required for translation. (T/F) Complimentary base-pairing is important for DNA replication, transcription and translation. T/F A point mutation is more likely to be damaging than a frameshift mutation. T/F The primary structure of a protein is encoded by the base sequence of DNA. T/F The DNA sequence 3'-TAC GAT-5' would be transcribed to RNA sequence: 5' ATG CTA-3' T/F The DNA code is considered unambiguous because a given codon only specifies one amino acid T/F

Explanation / Answer

Answer 20: F (As explained below)

In eukaryotes transcription occurs in the nuclues not in the nucleoid. Nucleoid is present in the prokaryotes.

Answer 21: F (As explained below)

Chargaff postulated that DNA of any cell of irrespective of species has a 1:1 ratio of pyrimidine and purine bases. He also suggested that amount of guanine is equal to cytosine and the amount of adenine is equal to thymine.

Answer 22: F (As explained below)

They also differ in their nitrogenous bases: DNA has thymine and RNA has uracil.

Answer 23: T (As explained below)

Gene eexpression can be regulated at any step from RNA transcription step to post-translational modification of a protein.

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