Ch. 11: Microbial Genomics

Question 1

What are paralogs?
- mutant genes in an organism
- genes that arise from a duplication event in an organism
- genes that are seldom expressed in an organism
- genes that are expressed at a high level in an organism
- genes that have no function in an organism

Answer 1

genes that arise from a duplication event in an organism

Question 2

What is the term for genes from different organisms that encode for proteins that carry out the same function but have different sequences?
- metalogs
- paralogs
- orthologs
- semilogs
- homolgos

Answer 2

orthologs

Question 3

T/F: Paralogs are genes that arose from a duplication event in the cell.

Answer 3

True

Question 4

T/F: Analysis of the genome sequence of an organism shows that an area of the genome contains a stretch of several thousand base pairs that differ significantly in % G+C content from the rest of the genome. Most likely this DNA was originally obtained from a gene duplication event.

Answer 4

False

Question 5

T/F: Metagenomics uses a culture-independent based genomic analysis of microbial communities to determine community composition.

Answer 5

True

Question 6

Determining DNA sequence through the analysis of overlapping DNA fragments is known as __ sequencing.

Answer 6

shotgun

Question 7

A culture-independent method that is used to study genomes from microbial communities in their natural environments is called __.

Answer 7

metagenomics