A cell is the smallest LIVING unit in a body. An atom is the smallest "nonliving" unit.
Answer: 1,3&4
Explanation:
The lac operon is induced by lactose in the absence of glucose, this is because when lactose is present in the medium, lactose binds to the repressor protein, one molecule on each subunit, causing a conformational change in the repressor.
The Repressor-lactose complex is in active, so the repressor does not bind to the operator site.
RNAP binds to the operator, identifies the promoter sequence and transcribe the structural genes.
RNAP can attach to the promoter site only when CAP doesn't bind the operator. In the absence of glucose in bacteria cAMP is available which combines with CAP, preventing CAP from binding the promoter site.
<span>The Golgi-Apparatus is the organelle that packages and distributes proteins that are received from the endoplasmic reticulum. It can be found in most eukaryotic cells, and was named after the Italian scientist Camillo Golgi who identified it in 1897. It is an important organelle whose function is also to process proteins for secretion, among other things. </span>
The cohesive properties of water (hydrogen bonding between adjacent water molecules) cause the water column to 'pull up' through the plant as water molecules evaporate on the surface of the leaf. This cycle was called the Sap Ascent Cohesion Theory in plants
Answer:
D.) nitrogen fixation
Explanation:
Nitrogen is in the soil and helps plants grow. This process is nitrogen fixation.