Answer:
Mitochondria is known as the powerhouse of the cell as it provides energy to the cell for performing different functions.
If a toxin causes pore in the inner membrane of the mitochondria and increases the permeability of the mitochondrial membranes. The permeability of mitochondrial membranes leads to mitochondrial swelling and causes cell death through necrosis and apoptosis.
Well water is of the most important parts of an ecsystem. If an ecosystem that has a lot of water like the rain forest had a bad drought everything would go wrong. All the plants would die. The animals would have to move somewhere else or they would die so that would cause a major disruption in the ecosystem that they converge or bombard on.
Drivers should not use their cell phones behind the wheels, because of the danger of accident. The use of cellphones causes 26% of the nation's car accidents. <span>Using a cell phone while driving increase your risk of having an accident about 400 percent. </span>
Answer:
The correct option is <em>B) bonds new nucleotides to parent strand</em>
Explanation:
DNA replication is a process by which DNA replicates by a semi-conservative method. The DNA double helix unwinds from the place where replication has to occur. Each strand of the DNA serves as a template strand for producing a daughter strand.
The DNA polymerase adds nucleotides complementary to each parent strand. In this way, a daughter strand is generated from the parent strands. This method of replication is termed as the semi-conservative method for DNA replication.
Answer:
1. The DNA of every eukaryotic cell is stored in one or more CHROMOSOMES located in the NUCLEUS
2. Chromosomes contain most of the cell's DNA which acts as the molecule of heredity.
3. A duplicated chromosome remains tightly paired with its partner at a region called the CENTROMERE
.
4. Before a cell divides, it copies all of its chromosomes. While the two copies of a chromosome are attached they are called SISTER CHROMATIDS.
5. DNA and protein together form a complex called CHROMATIN.
Explanation:
Chromosomes are the structures present in the nucleus of the cells and become visible during stages of cell division. Chromosomes carry genes in linear order. Chromosomes are composed of thin threads of chromatin which in turn is made of DNA and its packing proteins. Condensation of chromatin during cell division makes the chromosomes visible.
DNA is a nucleic acid and serves to store genetic information. Stretch of DNA that codes for a specific protein is called a gene. Genes regulate the genetic traits of organisms.
DNA replication occurs during the S phase of the cell cycle. The replicated DNA is accommodated in sister chromatids of chromosomes. Before the S phase, each chromosome has one chromatid and after the S phase, each of the chromosomes has two sister chromatids that are held together at the centromere. Therefore, each of the two identical halves of a duplicated chromosome is called sister chromatid.
