Please answer all Match the Mitotic stage with the description Answers can proph
ID: 87404 • Letter: P
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Please answer all
Match the Mitotic stage with the description Answers can prophase metaphase anaphase telophase nucleolus disappears and the nuclear membrane breaks down. The spindle disappears, and the nuclear envelop forms. Sister chromatids separate. Chromosomes are aligned on the spindle equator. Each chromosome is composed of two sister chromatids. 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 I of meiosis and Prophase II of mitosis. None of the above (All of the statements are true) PART II (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/FExplanation / Answer
19) Mitotic stage
a.) Prophase: nucleolus disappears and the nuclear membrane breaks down.
b.) Metaphase: Chromosomes are aligned on the spindle equator.
C.) Anaphase: Sister Chromatids separate.
d.) Telophase: The spindle disappears and the nuclear envelop forms.
20) The answer is d. Crossing over does not occur and there is no prophase II in mitosis. Crossing over occurs only in Prophase I of meiosis.
20) False. Nucleoid is present only in prokaryotes and in eukaryotes, transcription occurs in nucleus.
21) True. According to chargaff’s rule, the G: C and A: T content of DNA varies from species to species but the ratio of purine: pyrimidine remains constant.
22) False. Another difference between DNA and RNA is the nitrogen base. Thymine which is present in DNA is replaced by Uracil which is present in RNA.
23) True. Regulation of gene means to control the production of gene which can be carried out from transcriptional initiation, to RNA processing, and to the post-translational modification of a protein.
24) True. Regulation of gene means to control the production of gene which can be carried out from transcriptional initiation, to RNA processing, and to the post-translational modification of a protein.
25) True. mRNA acts as a template, rRNA acts as a machinery to produce protein, tRNA brings the specific amino acid required for translation of protein.
26) True. Stability to all the processes is obtained from the complimentary base pairing. Hence, has a vital role.
27) False. A frame shift mutation is caused due to insertion or deletion of nucleotides and are more harmful than point mutation
28) True. DNA is transcribed into RNA which undergoes translation to produce a stretch of amino acids (primary structure of protein)
29) False. In RNA, T is replaced by U, so the sequence should be 5’ AUG CUA3’.
30) True. The genetic code is specific and every codon codes for a particular amino acid only.
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