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TLS Online TPP Program
#Question id: 33912
#Unit 2. Cellular Organization
A. When a DNA molecule is negatively supercoiled, it is underwound.
B. Any structural change involving DNA strand separation becomes more likely in negatively supercoiled DNA.
C. Negative supercoiling makes establishment of left-handed Z-DNA in a segment of DNA
D. The formation of plectonemic or solenoidal supercoils is favored as a means of negative supercoiling.
Find true and false
TLS Online TPP Program
#Question id: 33913
#Unit 2. Cellular Organization
A. Underwinding of a B-DNA helix might facilitate or stabilize the formation of Z-DNA.
B. Underwinding aids in the transition by providing a local region of unwound DNA that allows the shift to Z-DNA.
C. Overwinding of a B-DNA helix might facilitate or stabilize the formation of Z-DNA.
D. Overwinding aids in the transition by providing a local region of unwound DNA that allows the shift to Z-DNA.
What is correct combination of statements
TLS Online TPP Program
#Question id: 33981
#Unit 2. Cellular Organization
The scaffold-associated regions are separated by loops of DNA. The scaffold itself may contain several proteins such as
A. Topoisomerase
B. SMCs
C. RNA Polymerase
TLS Online TPP Program
#Question id: 33982
#Unit 2. Cellular Organization
A. Chromosomes occupy chromosome territories in the nucleus and very much entangled with each other.
B. Heterochromatic regions, silenced genes, and gene-sparse regions of chromosomes are typically localized to the nuclear periphery and center of nucleus.
C. Active genes are often found at the borders and of chromosome territories
D. Active genes from several chromosomes may cluster in inter-chromosomal territories that are enriched in transcription machinery
Choose true and false
TLS Online TPP Program
#Question id: 33983
#Unit 2. Cellular Organization
Which of the protein hold heterochromatin region attached to nuclear wall
TLS Online TPP Program
#Question id: 33984
#Unit 2. Cellular Organization
Choose correct combination of statements
A. Each chromosome contains many fragments of very long duplex of DNA, folded into a fiber that runs continuously throughout the chromosome.
B. During interphase, euchromatin, which is slightly densely packed than mitotic chromosomes.
C. Regions of heterochromatin remain densely packed throughout interphase.
D. Various heterochromatic regions, especially those associated with centromeres, aggregate into a densely staining chromocenter