____________ are infectious proteins that can cause spongiform encephalitis.

The maximum rate of cell division occurs during the ___________________ growth phase? (fill in the blank)

What type of bond is found between the nucleotides of the two complementary strands of DNA?  

The cavity marked as #2 in figure is

____________ investigates the body’s structure, whereas __________ investigates the processes or functions of living things.

Within a protein, multiple amino acids are linked together by covalent bonds called            ————– bonds. 

Osmosis is the diffusion of water through a semipermeable membrane.   

The planes shown in the images are consecutively:

Centrosomes are associated with the nuclear membrane during the prophase stage of the cell cycle. In mitosis the nuclear membrane breaks down and the centrosome nucleated microtubules can interact with the chromosomes to build the mitotic spindle.

The mitotic spindle is a structure composed of micro-tubules which segregates chromosomes into the daughter cells during mitosis. A micro-tubule is a rope-like component of the cytoskeleton.. Which organelle shown in the picture serves as a micro-tubule organizing center during cell division?