Lessons on Rna

How does RNA differ from DNA?

• RNA contains uracil and deoxyribose
• RNA contains ribose and thymine
• RNA contains uracil and ribose
• RNA contains adenine and ribose

How would the DNA sequence GCTATA be transcribed to mRNA?

• GCUAUA
• CGATAT
• CGAUAU
• GCUTUT

In eukaryotes, functional messenger RNA molecules are made from

• exons spliced together after introns are removed
• introns spliced together after eons are removed
• exons spliced together with introns
• long pieces of RNA shortened by the Dicer enzyme

Tags

NGSS.HS-LS1-1

Promoters are

• genes that code for individual proteins
• proteins that bind with DNA and prevent transcription
• DNA sequences near operons that regulate transcription
• small molecules that bind with repressor proteins

The process by which the genetic code of DNA is copied into a strand of RNA is called

• translation
• transcription
• transformation
• replication

Which of the following describes RNA?

• RNA is usually double-stranded and contains the base thymine
• RNA is usually single-stranded and contains the base uracil
• RNA is longer than DNA and uses five bases to encode information
• RNA is made in the nucleus of eukaryotic cells and stays there to carry out its functions

In messenger RNA, each codon specifies a particular

• nucleotide
• enzyme
• amino acid
• promoter

The number of codons in the genetic code is

• 3
• 4
• 20
• 64

Which of the following statements about the genetic code is true?

• A codon can specify more than one amino acid
• Every codon specifies a different amino acid
• Some codons specify the same amino acid
• Some codons have no function at all

The process of making proteins on the ribosome based on instructions from messenger RNA is called

• transcription
• transformation
• translation
• molecular biology