What has been learned from comparative genomics studies?
a. Similar genes in different organisms perform very different functions.
b. Prokaryotic DNA has different nucleotide bases compared to eukaryotic DNA.
c. Similar genes do not exist in different species.
d. Some genes are present in the genomes of almost all present-day organisms.
e. Different species can have identical genome sequences.
ANSWER: d
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The ________ is a highly conserved amino acid sequence found in immunoglobulin, TCR, and MHC proteins
A) heavy chain B) V domain C) C domain D) light chain
Answer the following statements true (T) or false (F)
1. Most microbes that are extremophiles are Archaea. 2. Archaea are prokaryotes and Bacteria are eukaryotes. 3. A pathogen is a parasitic microbe. 4. Feeding antibiotics to livestock promotes human health. 5. Mitochondria originated from Proteobacteria.
Which of the following is considered part of a living organism's metabolism?
A) secretion of wastes B) growth and development C) responses to external stimuli D) reproduction
Which of the following is the correct overall equation for cellular respiration?
a) C6H1206 + 6 CO2 ---> 6 O2 +6H2O b) 6 CO2 + 6 h20 ---> C6H12O6 +6 O2 c) C6H1206 +6 O2 ---> 6 CO2 +6 H2O d) C8H12O8 + 8 O2 ---> 8CO2 +8 H2O