Question

the three types of rna involved in gene expression are:
○ mrna, trna, and rrna
○ mrna, xrna, and trna
○ mrna, trna, and trrna

question 30
2 pts
the number and appearance of a cell’s chromosomes, including lengths, banding patterns, and centromere positions, are collectively called what?
○ a polyploidy
○ a karyotype
○ a somatosome

Explanation:

First Question (RNA types in gene expression)

In gene expression, the three main types of RNA are messenger RNA (mRNA) which carries the genetic code, transfer RNA (tRNA) which brings amino acids, and ribosomal RNA (rRNA) which is part of ribosomes. The other options have non - existent RNA types (xRNA, trRNA).

A karyotype is defined as the number and appearance of a cell's chromosomes, including details like lengths, banding patterns, and centromere positions. Polyploidy refers to having multiple sets of chromosomes, and somatosome is not the correct term for this concept.

Answer:

A. mRNA, tRNA, and rRNA

Second Question (Term for chromosome number and appearance)