Name three covalent modifications that can be made to an RNA molecule in eukaryotic cells before the RNA molecule becomes a mature mRNA

What will be an ideal response?


1. A poly-A tail is added.
2. A 5? cap is added.
3. Introns can be spliced out.

Biology & Microbiology

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What do the results of research on gravitropic responses of roots and stems show?

A) Different tissues have the same response to auxin. B) The effect of a plant hormone can depend on the tissue. C) Some responses of plants require no hormones at all. D) Light is required for the gravitropic response. E) Cytokinin can only function in the presence of auxin.

Biology & Microbiology

Which is the smallest unit containing the entire human genome?

A) one human somatic cell B) one human chromosome C) all of the DNA in all of the cells of one human D) all of the DNA in all of the cells of the entire human population E) one human gamete

Biology & Microbiology

Avery, McLeod, and McCarty continued Griffith’s work with S. pneumoniae and concluded from their

experiments that DNA was the hereditary material. What would happen to mice after injection of heatkilled virulent bacteria mixed with live avirulent bacteria after treatment with proteinase if protein was the hereditary material instead of DNA?

a. the mice would live b. the mice would die c. the mice would get sick but recover d. the mice would grow tumors e. the mice would degrade the protein

Biology & Microbiology

In a signal transduction pathway involving phospholipid products as second messengers, after a G protein is activated,

the activated G protein then activates:a. IP2. b. IP3. c. protein kinase C. d. phospholipase C. e. adenylyl cyclase

Biology & Microbiology