<h2>
Answer:</h2>
Removal of the tarnish from the silver is a <u>physical change</u>.
<h2>
Explanation:</h2>
The type of change which doesn't produce any new substance is called as physical change. Tarnish refers to the thin black layer that is formed on the silver. Formation of tarnish is chemical change as due to oxidation a black color layer is formed.
On the other hand, removal of tarnish from silver is considered as physical change as no new product is formed and only we are obtaining the silver in its pure form.
Here is the steps of the lysogenic cycle. Lysogenic cycle occurs only in temperate phages.
<span>1. After the phage attached to the host cell, it will then inject its own DNA. </span>
<span>2. The inserted DNA circularizes.</span>
<span>3. The DNA is integrated into the host cell DNA. This is done through recombination.</span>
<span>4. Each time the cell replicates, the prophage is reproduced together with the host DNA.</span>
<span>5. The prophage excise itself from the host DNA. But this is very rare.</span>
Answer:
NO
Explanation:
The animal cell and plant cell are both eukaryotic cells. Eukaryotic cells are the type of cells that contains membrane-bound organelles, such as the nucleus, mitochondria, Golgi apparatus and a cytoskeleton.
The cytoskeleton, which is composed of microfilaments, internal filaments, and microtubules, <u>is present in both the animal and plant cells.</u>
However, some of the organelles that are not present in both the animal cell and the plant cell are centrosome and lysosomes.
<u>The </u><u>lysosome</u><u> is present only in the animal cell.</u>
The system that is affected when the xylem tissue is removed in plants
is water transportation. The scientific name for this process is
transpiration, and without the xylem tissue it would not be possible for
this process to occur.
Answer:
The nitrogenous bases of DNA are categorized into two types depending on their structure: Pyrimidines which contains a six-membered ring-like cytosine, thymine and uracil and purines which contains six members rings attached to a five-membered ring like in guanine and adenine.
The base pairing in DNA double-helical structure always takes place between purine and pyrimidines as:
1. The pairing between the purines and pyrimidines results in uniform diameter between two strands which provides stability to the ladder-like the structure of DNA.
2. The chemical side groups attached to the nitrogenous bases allow the formation of hydrogen bonds between purine and pyrimidines.
Therefore, A always binds T through two hydrogen bonds and G always bind C through three hydrogen bonds.