During kinesin movement, the trailing head moves forward to become the leading head upon:

The apicomplexan parasite Plasmodium falciparum causes malaria, a disease that kills hundreds of thousands of people each year. P. falciparum has an apicoplast, which is responsible for metabolite biosynthesis of essential isoprenoid precursors. Apicoplasts emerged after an endosymbiosis event. Thus, they share many genes with their red algal ancestors and with prokaryotes but few with humans. Based on your knowledge of apicomplexans and P. falicparum, which of the following theoretical drugs are likely to help treat malaria?

Cellular responses that require transcription and translation usually occur on the time-scale of:

The ______-subunit within heterotrimeric G-proteins is structurally similar to monomeric G-proteins.

An axoneme contains ______ pairs of microtubule doublets around its circumference.

The electron that gets bumped off chlorophyll a in the reaction center is replaced by an electron from:

Match the following descriptions to photosystem I, photosystem II, or both Descriptions: light energy excites electrons in chlorophyls energized electrons leaving this photosystem pump protons into the thylakoid energized electrons are used to form NADPH after leaving this photosystem  

During photosynthesis, which proteins(s) are involved in the movement of protons from the thylakoid lumen to the stroma? 

Which mechanisms do cells use to relay external signals during signal transduction.  Select all that apply.  Warning: you will lose points for selecting an incorrect choice.  

Which of the following cytoskeletal components is found predominantly around the cell cortex?