Molecular Genetics Review

Which of the following units are repeatedly joined together to form a strand of DNA?

• amino acids
• nucleotides
• fatty acids
• polysaccharides

What determines the code, or information, of a DNA molecule?

• the shape (structure) of the nitrogen bases
• the order (sequence) of the nitrogen bases
• the color of the nitrogen bases
• the frequency (number) of nitrogen bases

Tags

NGSS.HS-LS1-1

Transcription takes place in the 

• cytoplasm
• chloroplast
• nucleus
• mitochondria

STRUCTURE: One difference between RNA and DNA is -

• RNA has thymine where DNA has ademine

• DNA is single stranded where RNA is double stranded

• DNA is made in the nucleus where RNA is made in the ribosomes

• RNA is single stranded where DNA is double stranded

In a molecule of double-stranded DNA, the amount of adenine present is always equal to the amount of _________.

• cytosine
• guanine
• thymine
• uracil

The central dogma of biology states that information flows in one direction from 

• nuclei to RNA to cytoplasm
• ribosomes to proteins to DNA
• genes to nuclei to ribosomes
• DNA to RNA to proteins

What amino acid is represented by the codon UUA?

• Phenylalanine
• Tyrosine
• Leucine
• Stop codon

Which is the mRNA molecule that would be transcribed from this DNA template:
TGGCAAGTACGT

• ACCGTTCATGCA
• UGGCAAGUACGU
• UCCGUUCUUGCU
• ACCGUUCAUGCA

How many amino acids are coded for by this sequence of nucleotides:
ATG GGA ACT CCA

• 4
• 2
• 6
• 12

How would the DNA sequence GCTATA be transcribed to mRNA?

• GCUAUA
• CGATAT
• CGAUAU
• GCUTUT