Question

What is wrong with this?

1. Transporting molecules across cell membranes AGAINST the prevailing concentration gradient requires organelles and sodium.
2. The rough endoplasmic reticulum is a membrane system associated with apoptosis.
3. Phospholipids have polar tails.
4. Phagocytosis means cell death.
5. The primary site of chemical energy production occurs in the cell membrane.

Answer 1

1. Transport of molecules against concentration gradient is called as active transport. This process require a channel protein and energy in form of ATP

2. Rough endoplasmic reticulum is associated with synthesis of protein.

• Lysosome is associated with apoptosis as it contains several enzymes.

3 . Phospholipids have 2 ends -

• Head - they are polar and thus are Hydrophilic
• Tail - they are made of lipid and are non - polar, therefore they are hydrophobic

4. Phagocytosis is process of engulfment of pathogens by phagocytes like macrophages

• Necrosis and apoptosis are terms associated with cell death

5. Primary site for energy production is mitochondria, that's why it is called as power house of cell.

• Cell membrane regulate the transport of substance across it and separate cellular internal environment from external environment.

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