Cell Biology Answers

Is oxysome another name for FoF1 particle?

What are the different checkpoints in cell cycle?
I'm having trouble sorting the different checkpoints in cell cycle.I have suggested wikipedia it says there are three checkpoints; restriction point, G2-M DNA damage checkpoint and Spindle attachment checkpoint. But again 'Molecular Biology of the Cell' by Alberts and Johnson has mentioned of two DNA damage checkpoints , one at G1 and the other at G2.
There's no book saying what exactly are the different checkpoints in cell cycle. Please assist.
I would like to know the name of a book that has the different checkpoints mentioned.

What is Nissil body? I don't get the structure explained by wikipedia.

SER are structurally more stable than RER. What it meant by this?

define ascent of sap

Describe some of the ways that membranous organelles can maintain their unique compositions despite the continuous traffic of membranes and materials moving through them.

_______ may have formed the oxygen released into the early atmosphere.

Saprophytic bacteria

Cyanobacteria

Symbiotic bacteria

none of the above

What are cargoes?
Reference: Dynein is an exceptionally large cargo carrying multisubunit motor protein that moves along microtubules toward the minus end.

What is nucleation of microtubule?
If you could explain in simple words it would be of great help.

Why does ATP contain such a large amount of energy?
(please leave a more understandable answer for the lesser scientific mind please)