In designing a new drug, it must enter the cytoplasm of specific target cells in order for this drug to work. The similarity of the drug molecule to other molecules transported by the target cells can be a factor to determines whether molecules selectively enters the target cells.
Answer:
Fish in a small pond will most likely depend on which of the following biotic factors to meet their needs? Plants that exchange gasses with the pond water. Insects that feed on other insects in the pond. Water birds that prey on amphibians and small fish.
Explanation:
Cells are the smallest unit of life
Answer:
B, C, Dand E are all correct
Explanation:
Why B is correct- The cell membrane, also known as the plasma membrane, is a double layer of lipids and proteins that surrounds a cell and separates the cytoplasm (the contents of the cell) from its surrounding environment. It is selectively permeable, which means that it only lets certain molecules enter and exit.
Plants, animals, and bacteria have a cell membrane. Why d is correcect
Why C is correct- The cell membrane is not a solid structure. It is made of millions of smaller molecules that create a flexible and porous container. Proteins and phospholipids make up most of the membrane structure.
Why E is correct- The plasma membrane is primarily composed of phospholipids arranged in a bilayer, with the hydrophobic tails on the interior of the membrane, and the hydrophilic heads pointing outwards
Why A Is Not correct- It is very fragile and its role is to hold the cell together and to help control what substances can get in and out. It is partially permeable, allowing only some substances to pass through it. The membrane has a complex structure consisting of a phospholipid bi-layer and different types of proteins.
