DNA is double stranded, has A,T,G,C bases, and uses a deoxyribose sugar. RNA is single stranded, has A,U,G,C bases and uses a ribose sugar
300
Some virus are transmitted by mosquitos. Which tropical disease is caused by the transfer of viral RNA and has symptoms such as jaundice and liver damage?
Yellow Fever
400
In chromosomes, DNA strands are coiled around proteins called___________.
Histones
400
What is the biological definition of a species? (2 requirements)
A population of individuals that are capable of breeding with each other and producing fertile offspring.
400
The endosymbiont theory proposes that chloroplasts are descended from what organism?
In what organisms can peptidoglycan (a structural carbohydrate) be found?
Bacteria
400
Name the tissue layer that lines the interior surface of blood and lymphatic vessels.
The Endothelium
500
What does reverse transcriptase do?
Produces DNA from an RNA template. It is used by retroviruses
500
Scenario: a population of yellow, red, and green beetles is hit by a disease that, by chance, kills all except the yellow beetles. Future generations consist of only yellow beetles. What is this phenomena called?
Genetic Drift/Genetic Bottleneck. In this case, the yellow allele drifts to fixation.
500
An RNA molecule that can catalyze chemical reactions is called what? What organism were they first observed in?
Ribozymes. They were discovered in the protozoa Tetrahymena thermophila.
500
What carbohydrate is used to store energy in animals?
Glycogen
500
Somatic heart cells in the myocardium of the heart are what shape?