Can you please add the text?
Answer:
A chromosome is a DNA (deoxyribonucleic acid) molecule with part or all of the genetic material (genome) of an organism. Most eukaryotic chromosomes include packaging proteins which, aided by chaperone proteins, bind to and condense the DNA molecule to prevent it from becoming an unmanageable tangle. This three-dimensional genome structure plays a significant role in transcriptional regulation.Chromosomes are normally visible under a light microscope only when the cell is undergoing the metaphase of cell division (where all chromosomes are aligned in the center of the cell in their condensed form). Before this happens, every chromosome is copied once (S phase), and the copy is joined to the original by a centromere, resulting either in an X-shaped structure (pictured here) if the centromere is located in the middle of the chromosome or a two-arm structure if the centromere is located near one of the ends. The original chromosome and the copy are now called sister chromatids. During metaphase the X-shape structure is called a metaphase chromosome. In this highly condensed form chromosomes are easiest to distinguish and study.In animal cells, chromosomes reach their highest compaction level in anaphase during chromosome segregation.
Chromosomal recombination during meiosis and subsequent sexual reproduction play a significant role in genetic diversity. If these structures are manipulated incorrectly, through processes known as chromosomal instability and translocation, the cell may undergo mitotic catastrophe. Usually, this will make the cell initiate apoptosis leading to its own death, but sometimes mutations in the cell hamper this process and thus cause progression of cancer
Answer:
cell division
Explanation:
It starts with a cell called the mother cell, divides into two cells called daughter cells. If they have the same number of chromosomes it is called mitosis. As in there are two different stages of cell division. Where as meiosis, they don't have the same amount of chromosomes.
Answer: proteins
Explanation:
The myofibril proteins are organized into filaments of varying sizes thick and thin and is called myofilaments.
Answer:
a. pipette
Explanation:
The instrument used in the laboratory for measuring base is the pipette.
It is used to suck up the right amount of base for experimental purpose.
- The burette is used for measuring and holding the acid.
- The pipette is often used alongside a burette, conical flask and retort stand during a titration reaction.
- The pipette is a narrow cylindrical pipe usually made up of some special glass.
- It should be handled with caution as it is a very fragile device.
