Ribosomes
Cytoplasm
Mitochondria
Nucleus
Cell wall and chloroplasts
Lysosome
Golgi apparatus
Endoplasmic reticulum
Water in the roots is pulled through a plant through the transpiration. Transpiration is the loss of water vapor through the Stomata of the leaves. It uses 90 percent of the water that enters the plant and the remaining 10 percent is used in photosynthesis and cell growth.
Answer:
The gene for beta-galactosidase turns off.
Explanation:
The gene that codifies the beta-galactosidase enzyme is part of the <em>lac</em> operon, which also contains two other genes that produce enzymes involved in the metabolization of lactose.
Between glucose and lactose, the bacteria will preferentially use glucose as an energy source. On the other hand, lactose is a dimer, and thus a series of enzymes are needed to process lactose before its use as an energy source.
If there is no lactose present, the genes contained inside this operon are turned off (the operon is repressed).
Answer:
At the “center” of each amino acid is a carbon called the α carbon and attached to it are four groups - a hydrogen, an α- carboxyl group, an α-amine group, and an R-group, sometimes referred to as a side chain.
Explanation:
Cellulose, chitin, and peptidoglycan are all considered as
carbohydrates. Now in the molecular level of these carbohydrates, structural polysaccharides exist as sets of long, parallel
strands that are linked to one another. Due to this arrangement, pulling
and pushing forces are being withstand.
