Answer:
The correct answer is option b. "20 H1, 40 H2A".
Explanation:
Chromatin is a complex that protects and condenses the genetic material comprised of DNA and proteins. When chromatin is in the form of a 30 nm fibril, nucleosomes have a regular positioning along the DNA. This means that each nucleosome is associated with a single H1 molecule. Therefore a chromatin containing 20 nucleosomes will have 20 copies of H1 and 40 copies of H2A, because each nucleosome has 2 copies of the core histone H2A.
Answer: Option (A) is the correct answer.
Explanation:
Beaches are the places which are part of shore of an ocean, sea, large river etc.
There are pebbles and sand at the shore of a beach. Waves of water in an ocean always change the ocean due to erosion and addition of sand.
It is the force acted by the wave that pushes or pull the sand in different directions every time the wave comes.
So we can conclude that the statement beaches are always changes due to factors such as waves adding and eroding sand best describes beaches.
It is during G1 phase that a a cell release cdks to initiate the events for cell division. At this stage, b<span>iochemical triggers known as </span>cyclin-dependent kinases<span> (Cdks) switch on cell cycles events at the corrected time and in the correct order to prevent any mistakes.</span>
Answer:
Although snakes belong to the taxonomic class of reptiles and worms belongs to broad categories of flatworms, roundworms and segmented worms. They exhibit may similarities which proves a fact that they are closely related. These organisms show similar type of skin, sensory organs, behavior and habitat. Both snakes and worms are adapted to show slithering and wriggling like locomotion. Both of these organisms exhibit long and cylindrical bodies.
