Answer:
-Option (d).
Explanation:
BFB (breakage-fusion-bridge) cycle can be defined as a mechanism associated with chromosomal disabilities. The breakage-fusion-bridge cycles are associated with tumorigenesis as it induces chromosomal abnormalities in cells.
It starts with breakdown of chromosomal end region (telomere). When that chromosome goes for replication, daughter chromatids formed by it lack telomere.
During anaphase, fused chromosomes get separated and each daughter cell gets a chromosome without telomere. These mutated daughter cells replicate again and as this process rerun, it can lead to accumulation of chromosomal instability and tumor formation.
Thus, the correct answer is option (D).
Answer:
Prevailing winds influence the precipitation by regulating amount of water vapor in air, direction of wind movement and by making cold and hot air masses to move.
Explanation:
Winds make both hot and cold air masses to move. The hot air rises up with wind and cold air rushes to take its place. The hot air coming from water bodies towards the land carry ample of water vapor and causes precipitation in the region. On the other hand, the air coming from land masses does not have enough water vapor to cause any rains in the region.
Answer:
x= peroxisome z= smooth endoplasmic reticulum
Explanation:
Vestigial structure. The coccyx serves no functional purpose in humans.
Based on the structure and arrangements of nucleotides in the <u>DNA </u>molecule, the molecule is an information molecule. It stores instructions and is read to produce proteins that direct cellular reproduction, produce new cellular components, and initiate cellular reproduction.
<h3>Describe DNA.</h3>
Deoxyribonucleic acid is referred to as a DNA Trusted Source. It includes units known as nucleotides, which are biological building blocks.
For most other organisms in addition to humans, DNA is an essential chemical. Our genes and genetic material, which are what gives us our individuality, are both found in our DNA.
<h3>What is the DNA's structure?</h3>
A DNA molecule is created from a group of nucleotides. There are three components in each nucleotide:
- a phosphate group
- a sugar
- a base of nitrogen
The name of the sugar in DNA is 2-deoxyribose. The "backbone" of the DNA strand is made up of these sugar molecules that are in alternation with phosphate groups.
In a nucleotide, each sugar is joined to a nitrogen base. Nitrogen bases come in four main varieties in DNA. They consist of:
- adenine (A)
- cytosine (C)
- Thymine(T)
- guanine (G)
Learn more about DNA here:-
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