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Disrupted food webs, increased competition, disrupted life cycle events, forced relocation
Answer:
Lactose intolerance may be defined as the medical condition in which the individual is not able to digest the products that contain lactose. This might occur due to the improper functioning of the enzyme lacatse. The individual must avoid the milk and related products.
More than 60% of the human population suffers from the lactose intolerance. The population that shows predominantly lactose intolerance are Scandinavian, Northern European ancestry and nomadic peoples of the middle east and Africa.
Answer: B) R group
Explanation: An aminoacid is composed by an amino group, an acid or carbonyl group and a side chain or R group, all bonded to a central carbon atom. Aminoacids are different between them for the R group and can be classified as: 1) Non-polar Neutral if the side chain is uncharged and non-polar (aliphatic or cyclic). 2) Polar Neutral if the side chain contains amida, sulfur or hydroxyl groups. 3) Basic if the side chain contains other amino groups. 4) Acid if the side chain contains other carboxyl groups.
The enzymes that are used to replicate a virus are synthesized by the host cell. That is option A.
<h3>Process of viral infection.</h3>
A virus is a microorganism that has the ability to reproduce only by infecting a living host.
The main features of a virus include:
- nucleic acid genome ( RNA or DNA)
For a virus to be able to cause an infection,it has to pass through the following steps:
- Attachment of the virus to the host cell.
- Entry of the viral genetic material into the host cell
- Genome replication and gene expression: through the ribosomes of the host cells, enzymes are released which are used to replicate the invading virus to produce new ones.
Therefore, the enzymes that are used to replicate a virus are synthesized by the host cell.
Learn more about virus here:
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