Compare and contrast the principal types of RNA in terms of their cellular roles, relative abundance, and variation in length
What will be an ideal response?
rRNA is the most abundant, serves a structural and functional role in a ribosome, and can be found in six widely different lengths. tRNAs are the next most abundant, carry amino acids to ribosomes for incorporation into proteins, and exhibit a narrow range of sizes. mRNAs are the least abundant, provide a blueprint for translation, and have the widest range of lengths observed.
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Components of the central nervous system include (check all that apply)
A. projection of neuron from spine to muscle cell. B. brain. C. nerve cord. D. spinal cord.
Which of the following shows Chargaff's equivalence?
A) RNA B) single-stranded DNA C) histones D) double-stranded DNA E) deoxyribose
The "Age of Fishes" is an informal name for which time period?
a. Silurian period b. Permian period c. Devonian period d. Ordovician period e. Carboniferous period
Which of the following is a distinctive component of the cell wall of gram-negative bacteria?
A. Capsule B. Lipopolysaccharide C. Peptidoglycan D. Cytoplasmic membrane