What are the different types of RNA that are found in a cell, and what are their functions?
What will be an ideal response?
The different types of RNAs found in the cell are mRNA, tRNA, rRNA, and micro RNAs. mRNAs carry the information from the DNA to make the proteins. tRNAs have the unique capacity to bind with the mRNA codon at one end of the molecule and amino acids at the other end. tRNAs bring amino acids to the growing polypeptide chain. rRNAs and a mixture of proteins make up the ribosomes. Micro RNAs are small (about 22 base pairs long), single-stranded molecules that are regulatory in function.
You might also like to view...
Evolution by natural selection ________
A) requires that multiple unverified assumptions are made before it can be considered a viable explanation B) is only a theory and therefore not testable C) can be tested experimentally D) can be tested observationally E) Both C and D.
In a study of ponds and nearby terrestrial ecosystems, Tiffany Knight and colleagues showed that the presence of fish in ponds had indirect, positive effects on the seed set of terrestrial plants. In particular, fish exerted this influence through their direct, negative effects on which organisms?
A) larval dragonflies B) adult dragonflies C) insect pollinators of plants D) plants
________ is a disease of the respiratory tract caused by the bacterium Mycobacterium tuberculosis.
Fill in the blank(s) with the appropriate word(s).
An extremely rare occurrence in humans is a multiple pregnancy with the embryos at different stages due to fertilization weeks apart. What mechanism normally prevents this from happening?
A. The embryo's secretion of FSH and LH maintains the corpus luteum, keeping estradiol and progesterone high until the placenta takes over secretion of these hormones. B. The follicle's secretion of polar bodies maintains the fimbriae, keeping estradiol and progesterone high until the fallopian tube takes over secretion of these hormones. C. The embryo's secretion of GnRH maintains the corpus luteum, keeping FSH and LH high until the placenta takes over secretion of these hormones. D. The embryo's secretion of hCG maintains the corpus luteum, keeping estradiol and progesterone high until the placenta takes over secretion of these hormones.