A researcher identifies the nucleotide sequence AAC in a long strand of RNA inside a nucleus. In the genetic code, AAC codes for the amino acid asparagine. When that RNA becomes involved in protein synthesis, will asparagine necessarily appear in the protein? Use specific content to support your argument.

Suggest a means by which you could separate mRNA from the other types of RNA in a eukaryotic cell.

What feature of RNA would allow it to function as a ribozyme? Why are there no naturally occurring DNA enzymes?

How many codons are possible for an RNA trinucleotide having an adenine base, and two cytosine bases?

How many 11-element RNA sequences consist of 4 As, 3Cs, 2Us, and 2Gs, and end with CAA?

Which of the following is an example of post-transcriptional gene repression? a. The amount of RNA transcribed from a gene is reduced because the DNA is methylated. b. The amount of RNA is reduced because it is rapidly degraded. c. The amount of protein made is reduced by action of an miRNA. d. b and c are both correct.

Researchers discovered a new virus and characterized its genome by determining the base composition and the percentage of each base. You want to categorize the virus by its genetic material. Remember that viruses may contain single-stranded DNA or RNA or double-stranded DNA or RNA as the genetic material. Given just the sequence information, propose a way to distinguish if the genetic material is RNA or DNA. Propose a way to distinguish if the genetic information is single-stranded or double-stranded.

$$\textbf {\color{#19804f}{Compare}}\text{ the roles of the three different types of RNA during translation.}$$

How does a purine differ from a pyrimidine? What purines and pyrimidines are found in DNA and RNA?

Which of the following are kinds of lipids?

A. Fats, phospholipids, and steroids.

B. Fructose and Glucose.

C. DNA and RNA

Which steps during the translation of bacterial mRNA involve an interaction between complementary strands of RNA?

What regulates the timing of the cell cycle in eukaryotes?

A chromosomes

B cyclins

C nutrients

D DNA and RNA

Explain why Avery, MacLeod, and McCarty’s in vitro transformation experiment showed that DNA, but not RNA or protein, is the hereditary molecule.

Match the type of molecule that is involved in gene expression with the appropriate description.

Types of molecules:

• Ribosomal protein

• tRNA

• Ribosomal RNA

• mRNA

• Gene

Descriptions:

A) Structural RNA that links an amino acid to an anticodon.

B) Contains information to be translated (as codons).

C) Forms part of the enzyme that drives translation.