Q1) The genetic code is redundant because there are many functional RNAs the rib
ID: 269580 • Letter: Q
Question
Q1) The genetic code is redundant because
there are many functional RNAs
the ribosome contains many proteins and few RNAs
the wobble position, and multiple codons for the same amino acid
there are multiple stop codons, and conserved tRNA structure
Q2) Sister chromatids are formed during ___ and separate during ___.
S phase; meiosis 2
G1 phase; mitosis
S phase; G2 phase
S phase; meiosis 1
G1 phase; meiosis 2
Q3) How are the ends of linear chromosomes protected?
By phosphorylation
By telomerase adding many copies of a specific repeated DNA sequence
By a polyA tail
We don't yet know
By circularization
Q4) A new student researcher finds a short winged fly in the lunch room. He takes it back to the lab and decides to cross it with a fly with normal long wings. He counts in the offspring 450 short winged flies and 450 flies with normal long wings. Is the short winged mutation dominant or recessive? And what kind of cross was this?
Recessive; self cross
Recessive; back cross
There's not enough information to tell
Dominant; test cross
Dominant; self cross
Explanation / Answer
1. the wobble position, and multiple codons for the same amino acid
The genetic code is redundant because sometimes a single amino acid is coded by many codons.
2. S phase; meiosis 2
Sister chromatids are formed during S phase and separate during meiosis 2.
3. By telomerase adding many copies of a specific repeated DNA sequence
telomerase enzyme prevents loss of the ends of DNA.
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