The average length of a transcription unit along a eukaryotic DNA molecule is about 27,000 nucleotide pairs, whereas an averaged-sized protein is about 400 amino acids long. What is the best explanation for this fact?
A. Each amino acid in a protein is encoded by a triplet of nucleotides.
B. Many genes are subject to alternative RNA splicing.
C. Most eukaryotic genes and their RNA transcripts have long noncoding stretches of nucleotides that are not translated.
Ans: C. Most eukaryotic genes and their RNA transcripts have long noncoding stretches of nucleotides that are not translated.
You might also like to view...
What is the preferred name of the technique used to determine if DNA comes from a particular individual?
A) DNA technology B) DNA profiling C) DNA microarrays
Approximately 5% of the cytosine residues are methylated in the genome of any given eukaryote. In what way is DNA methylation related to genetic regulation?
What will be an ideal response?
What is the correct order of visual information?
a. Pigment absorbs light - signal flows to the neuron - signal moves to the optic nerve- signal moves to the ganglion b. Pigment absorbs light - signal moves to the optic nerve - signal moves to the ganglion - signal flows to the neuron c. Pigment absorbs light - signal flows to the neuron - signal moves to the ganglion - signal moves to the optic nerve d. Signal flows to the neuron - signal moves to the ganglion - signal moves to the optic nerve- pigment absorbs light e. Signal moves to the optic nerve - pigment absorbs light- signal flows to the neuron - signal moves to the ganglion
Which of the following hormones may take part in one or more of these functions: daily rhythms, long periods of sleep, and depression?
A) melatonin B) thymosin C) oxytocin D) growth