Question

13. Why do cells need both tRNA and mRNA? (1 point)

Answer 1

Answer:

Answer 1: Option (C):The tRNA in used on the ribosomes and the mRNA is used in the nucleus.

Answer 2:Option(C): There is no effect on the phenotype of a specie, as most of the species DNA is altered and there are a few changes which occurs inside the phenotype of any specie exposed to mutation in general.

Answer 3:Option(A):Deletion is a type of mutation during which the part of the genetic sequence or DNA is not placed at its original position but the loss of the fragment occurs, in the process causing the change in the genome of the specie.

Answer 4:Option (B): The weakening the DNA strand or interfering with base pairing of the DNA sequence inside the DNA molecules.

Explanation:

1. tRNA is present inside the ribosomes, as it operates by detaching the required number of amino acids and letting the sequence change into the required proteins, which then goes out of the ribosomes into the cell body.
2. Mutation has no such effect on the phenotype or the visible properties of any specie. As much of the mutation which occurs is in the DNA sequence of the specie which is exposed to the effect.
3. Mutations basically brings change to the actual or original DNA sequence of the specie, as during the process a fragment or any part or sequence of nucleotide's are altered and are lost in the process to create a new DNA molecule, as the process is called as Deletion in the mutation term. As it will cause different disorders and the diseases inside the organism.
4. Carcinogen, there are different elements which causes different alterations in the DNA and in the over all genome of the specie. As the DNA sequence is altered and in the base pairing of the sequences inside the genome of the species.

Answer 2

1. tRNA is the one carrying amino acids

2. Mutation does not always affect the evolution of a species because not all mutations affect an entire species. 

3. The type of chromosomal mutation that occurs here is an example of a deletion mutation. Specific genetic data, or DNA is removed and the remaining portions of chromosomal information have rejoined. 

4. A chromosomal deletion mutation

5. The mutagens that result in cancer damage DNA by (b) weakening the DNA strand or interfering with base pairing. This mutagens are called carcinogens, if they cause a damage to a gene that makes a DNA repair protein, it means that a cell will have less ability to repair itself, and ,as a result, this will lead to formation of cancer.