The basic steps of light-dependent reactions are:
• Light absorption in Photosystem II (PSII) and excitation of PSII
• ATP synthesiS-proton gradient in electron transport chain isdriving ATP production in a process of chemiosmosis
• Light absorption in Photosystem I (PSI) and excitation of PSI
• Reduction of NADP+ and the photolysis of water.
Answer:The oxygen-rich blood from your lungs is carried to the left side of the heart through the pulmonary veins. The heart pumps the blood to the rest of the body, where oxygen in the red blood cells moves from blood vessels into your cells. Your cells use oxygen to make energy so your body can work.
Answer:
These are some of the disadvantages of sexual reproduction: time and energy are needed to find a mate.
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When an oncogene is turned on and is not balanced through suppression
of tumor suppressor gene, the normal
cells become cancerous and divides unregulated.
Normal cells differentiate while cancer cells do not. Additionally,
while normal cells respond to endocrine
and paracrine signals from neighboring cells, cancer
cells do not. Cancer cells have malfunctioned
apoptosis process due to a malfunctioned p53
tumor suppressor gene. Therefore they
continue to divide even when they have damage to their DNA. Cancer cells metastasize because, unlike normal cells, they do not produce an adhesive molecule that allows the cells to adhere to one another to form tissue.
