Which of the following types of rna is known for its catalytic abilities?
dsrna
mrna
rrna
trna

rRNA.

Explanation:

Ribozymes are known as the RNA molecule that has the ability to work as catalyst. This ribozymes were first found in the introns of the RNA transcript.

Ribosomal RNA or rRNA acts as the ribozymes that has the ability to work as a catlayst. The main function of rRNA is the linking of the amino acids in the translation process for the formation of protein.

Thus, the correct answer is option (3).

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.