Practice Quiz-2 PDF

Practice Quiz-2 1. The structures that cap the ends of eukaryotic chromosomes are called: a) b) c) d) 2. centromeres telomeres mitotic spindle histones The structure that allows each duplicated eukaryotic chromosome to be separated during M phase is a) centromere b) telomere c) histones d) nucle...

Practice Quiz-2 1. The structures that cap the ends of eukaryotic chromosomes are called: a) b) c) d) 2. centromeres telomeres mitotic spindle histones The structure that allows each duplicated eukaryotic chromosome to be separated during M phase is a) centromere b) telomere c) histones d) nucleosome 3. What statement about nucleosomes is false? a) A nucleosome is a bead on a string of unfolded chromatin b) A nucleosome produces a 3-fold packing ratio of DNA c) Nucleosomes are found only in mitotic chromosomes d) A nucleosome consists of DNA wrapped around 8 histone proteins, plus a short segment of linker DNA 4. The DNA in eukaryotic chromosomes is folded into a compact form by interactions with: a) RNA b) Proteins c) Heterochromatin d) Microtubules 5. Histone proteins pack DNA into a repeating array of DNA-protein particles called: a) heterochromatin b) nucleosomes c) euchromatin d) nucleoli 6. The core histone proteins have tails that can be chemically modified by what type of group? a) Acetyl b) Phosphate c) Methyl d) Any of the above 7. In the chromatin of interphase chromosomes, regions of the chromosome that contain genes being expressed are generally more compact, while those that contain quiescent genes are generally more extended. a) True b) False 8. The Reverse transcriptase is a a) DNA-based RNA polymerase b) RNA-based DNA polymerase c) RNA-based RNA polymerase d) Ligase-dependent RNA polymerase 9. Inheritance of a phenotypic changes in a cell or organism that do not result from changes in the nucleotide sequence of DNA is called a) Chromosomal inheritance b) Epigenetic inheritance c) Phenotypic inheritance d) Auxiliary inheritance 10. Which of the following is not true for the chromatin remodeling complex? a) It can destabilize histone-DNA interaction b) It can change the nucleosome position c) It hydrolyzes ATP for chromosome segregation d) It has multiple subunits 11. Histone code specifies a) Gene expression b) Gene silencing c) Heterochromatin formation d) All of the above 12. Each chromosome in human has a) Multiple centromeres, two telomeres, and one replication origins b) Multiple replication origins, two centromeres, one telomere c) Multiple replication origins, one centromere, two telomere d) Two telomeres, one centromere, one replication origin