Several scientific laboratories across the globe are involved in research concerning the origin of life on Earth. Which graph below, if the results were produced abiotically, would have the greatest promise for revealing important information about the origin or Earthʹs first genetic system?

#Question id: 2457

#Unit 2. Cellular Organization

The two proteins that play the most important role in actin microfilament elongation are:

#Question id: 28428

#Unit 5. Developmental Biology

Two-layered blastoderm epiblast and hypoblast is joined together at the marginal zone of the area opaca, and the space between the layer's forms ____

#Question id: 1267

#Unit 4. Cell Communication and Cell Signaling

Multiple integrin forms arise from

#Question id: 1341

#Unit 4. Cell Communication and Cell Signaling

Which of the following molecules forms extracellular cross-linked fibrils of great tensile strength?

#Question id: 2853

#Unit 2. Cellular Organization

Not all bacteria need to maintain their DNA in a negatively supercoiled state. Bacteria that prefer to grow at very high temperatures must expend energy. Which of the following observation found to be true?

A. Bacteria don’t need to expend energy to prevent their DNA from unwinding due to thermal denaturation

B. These bacterial organisms have a different topoisomerase called reverse gyrase

C. Reverse gyrase decrease the linking number of relaxed DNA in the presence of ATP