When Astronomers Have Examined Rich Clusters of Galaxies with Their

question 10

Multiple Choice

When astronomers have examined rich clusters of galaxies with their instruments, they have found that these clusters

• A) contain far more spiral galaxies in their central regions than elliptical galaxies
• B) are more likely to contain giant elliptical galaxies than poor clusters
• C) are the only places in the universe where galaxies find a way NOT to collide
• D) contain mostly galaxies dominated by the light of young stars (stars formed recently)
• E) are so big that there is a lot more space between the galaxies than in poor clusters like our Local Group

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Definitions:

mRNA Codons

Triplet sequences of nucleotides in messenger RNA that specify which amino acid will be added next during protein synthesis.

Leucine

Leucine is an essential amino acid necessary for protein synthesis and various metabolic functions in the body, not synthesized by the organism and must be obtained from the diet.

Template DNA

Strands of DNA that serve as guides for synthesizing complementary DNA or RNA molecules during genetic replication and transcription.

Parallel

Occurring or existing at the same time or in a similar manner, often in comparison to something else.