Which organelle is semi-permeable and allows the thing in and out of the cells

For the hydrolysis of atp to adp + i, the free energy change is - 7.3 kcal/mol under standard conditions (1 m concentration of both reactants and products). in the cellular environment, however, the free energy change is about - 13 kcal/mol.

Some insecticides interfere with the removal of acetylcholine from the synaptic cleft. what effect will this have on muscle contraction

Why is the cell membrane referred to as a fluid mosaic?

What causes the "heat island" effect?

Do you think three weeks (21 days) is enough time to observe all of the Moon's phases? Why or why not?

Your alien friend from planet Xenon is visiting and wants to learn how to breed pea plants. You show your friend a recent batch of pea plants with purple flowers that you grew by crossing plants that had purple flowers with plants that had white

The green stem ant has three (autosome) chromosomes. During meiosis, chromosome 1 and 3 separate normally, but chromosome 2 homologs do not separate during meiosis I. Meiosis II happens normally. What will the resulting cells of meiosis look like?

A population is growing at a rate of 2,4,8, 16, 32. Which type of growth does this describe?

Which epithelial tissue type is most often found lining large ducts, such as those of the salivary glands or pancreas?

Evolution led to certain fishes, such as lung fishes to adapt to terrestrial mode of life. These fishes were the ancestors of modern amphibians. Which evolutionary mechanism is represented by this example?