MOLECULAR BIOLOGY EXAM 2 1. What is chromatin? A.) The protein core of the chrom
ID: 65797 • Letter: M
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MOLECULAR BIOLOGY EXAM 2 1. What is chromatin? A.) The protein core of the chromosome. B.) The 30nm fiber C) The protein-DNA complex found in the eukaryotic chromosome. D.) The histone and non-histone protein in eukaryotes. 2. In a nucleosome, what is the DNA wrapped around? A.) Polymerase molecules B.) Ribosomes C.) mRNA D.) histones E.) nucleolus protein Which of the following statements concerning the eukaryotic chromosome is false? A.) If is composed of DNA and protein. B.) The nucleosome is the most basic structural subunit. C.) The number of genes on each chromosome is different in different cell types. D.) If consist of a single linear molecule of double-stranded DNA. E.) Active transcription occurs on each chromatin. 3. 4. If a cell were unable to produce histone proteins, which of the following would be expected to occur. A.) There would be an increase in the amount of " satellite" DNA produced during centrifugation. B.) The cell's DNA couldn't be packed into its nucleus. C.) Spindle fibers would not form during prophase D.) Amplification of other genes would compensate for the lack of histones E.) Pseudugenes would be transcribed to compensate from the decreased protein in the (RNA)g statement is t The following statement is true about alternative splicing ofa primary transcript A.) More than one mRNA can be produced from one gene. B.) Transcription of alternative exons takes place by RNA polymerase. C.) DNA and RNA polymerase alternate to complete transcription. D.) Takes place in prokaryotes and eukaryotes. E.) Take place only in cancer cells. 5·Explanation / Answer
1) c) The protein DNA complex found in the eukaryotic chromosome
2) E) Nucleolus protien
3) A) if is composed of DNA and protein
4) D) Amplification of other genes would compensate for the lack of histons
5) Transcription of alternative exons take place by RNA polymerated.
6) D) Different gene expression
7) A) Replication
8) c) Acetylation, methylation
9) B) Translation
10) c) They are located only in introns
11) C) Type of mutation
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