As the two strands of the double helix are separated, the positive supercoiling interferes with the further unwinding of DNA. Which of the following enzyme makes a break in a strand of DNA to release the supercoiling and facilitate the replication to occur?

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#Question id: 27878

#Research Methodology

Random sampling is also called _____________.

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#Question id: 23255

#SCPH06 I Botany

From where do these centromeric probes are derived from the 

1. Highly repetitive DNA sequences

2. Alpha-satellite DNA sequences

3. Less repetitive DNA sequences

4. Beta-satellite DNA sequences

Which of the following option has correct combination?

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#Question id: 17073

#SCPH28 | Zoology

Hypoxanthine is converted into guanine by the enzyme HGPRT an enzymes of the salvage pathway. What does HGPRT stands for?

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#Question id: 16477

#SCPH28 | Zoology

Individual cell lineages are first isolated from an organ they are then grown separately to high density in a three- dimensional matrix. This  type of culture is called

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#Question id: 5048

#SCPH06 I Botany

when a cell or tissue is capable of differentiating autonomously even when placed into another region of the embryo or a cluster of differently specified cells in a petri dish. This cell or tissue said to be-