#Question id: 28293
#Unit 5. Developmental Biology
Which enzyme used in the former cortical granule membrane catalyzes the formation of hydrogen peroxide?
#Question id: 8782
#Unit 9. Diversity of Life Forms
A phylogenetic tree is shown for the three domains of life (Eukarya, Archaea, and Bacteria). The tree branches in two directions from the first point, labeled Common ancestor of all life. One branch leads in the direction of Eukarya and Archaea, and the other branch leads to Bacteria. The branch leading to Eukarya and Archaea divide, one branch leading to each domain. The branch leading to Eukarya divides into four branches. One leads to Euglenozoans, and the other three lead to branching points. The first leads to Forams in one direction, and another branching point in the other that leads to Diatoms and Ciliates. The second branching point leads to Red algae in one direction, and a branching point that leads to green algae and land plants in the other direction. The third branching point leads to amoebas in one direction, and a branching point that leads to fungi and animals in the other direction. Land plants, Fungi and Animals are all highlighted.
Cyanobacteria were once called blue-green algae because they are photosynthetic. According to the phylogeny shown, the cyanobacteria are more closely related to gram-positive bacteria than to ________.
#Question id: 7022
#Unit 5. Developmental Biology
Two teratogens known to cause cyclopia in vertebrates are jervine and cyclopamine. Both targets hedgehog pathway. Both teratogens inhibits:
#Question id: 4336
#Unit 3. Fundamental Processes
Which of the following processes would result from a mutation that deactivates a regulatory gene of a repressible operon in an E. coli cell?
#Question id: 557
#Unit 1. Molecules and their Interaction Relevant to Biology
The number of substrate molecules converted to product in a given unit of time by a single enzyme molecule at saturation is referred to as the: