Trnas carrying the correct amino acid recognize the proper codons on the mrna because a. the anticodon of the trna hydrogen binds to the codon of the mrna by complementary base pairing. b. the codon of the mrna binds the correct amino acid, and the trna stabilizes this interaction. c. the codon of the trna binds to the anticodon of the ribosome by complementary base pairing. d. the amino acid binds to the anticodon of the mrna and brings the correct trna with it.

The correct answer is A

The anticodon of the tRNA hydrogen binds to the codon of the mRNA by complementary base pairing

The complementary base pairing:

If Codon  of the mRNA is - 5' AGCTCA-3'

The anticodon of the tRNA would be - 3' GATCTG-5'

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!