Why is RNA thought to have been the first genetic material?
A) RNA is structurally simpler than DNA.
B) RNA has been found on meteorites.
C) RNA is capable of self-replication
D) Primitive organisms, such as some viruses, have RNA as their genetic material.
C
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Distinguish between the structure of a duplicated chromosome before mitosis and the chromosome produced by separation of two chromatids during mitosis.
What will be an ideal response?
Mycorrhizae are formed by the association of plants with ________.
A. cyanobacteria B. fungi C. algae D. actinomycetes
During electrical stimulation of the heart, the impulse pauses briefly at the ________ before continuing on to the ventricles
Fill in the blank(s) with correct word
A certain organism has a mutation in the shelterin gene that makes it non-functional. Which of the follow consequence would you expect from this mutation?
a) Nucleosomes would not be formed so DNA can not be compacted as tightly. b) Epigenetic control would not be possible. c) The phosphodiester bonds between nucleotides would not be formed. d) DNA could not be repaired if it underwent damage. e) The telomere overhand region would become accidentally repaired, thus lengthening the chromosomes unintentionally.