CH 13 Practice Link (2020)

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

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

In messenger RNA, each codon specifies a particular

• nucleotide
• enzyme
• amino acid
• promoter

Tags

NGSS.HS-LS1-1

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

Tags

NGSS.HS-LS1-1

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

• transcription
• transformation
• translation
• molecular biology

Tags

NGSS.HS-LS1-1

Changes in DNA sequences that affect genetic information are known as

• replications
• mutations
• transformations
• translations

Tags

NGSS.HS-LS3-2

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains Uracil

Tags

NGSS.HS-LS1-1

What are the three components of a nucleotide?

• sugar, hydrogen, nitrogen base
• sugar, oxygen, nitrogen base
• sugar, phosphate, nitrogen base
• sugar, phosphate, protein