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The log phase is called as the logarithmic phase or the exponential phase.
It is a period characterized by cell doubling.
The number of new bacteria appearing per unit time is proportional to the present population.

Leghemoglobin is a heme-containing protein.
It is responsible for carrying oxygen in the root nodules of soybean, alfalfa, and other nitrogen-fixing plants.
Biologically, soybean leghemoglobin works in a symbiotic relationship and provides soil bacteria with oxygen.
The presence of oxygen in the root nodules would reduce the activity of the oxygen-sensitive nitrogenase, which is an enzyme responsible for the fixation of atmospheric nitrogen.

Saccharomyces cerevisiae is a species of yeast.
It is a single-celled fungus microorganisms.
The species has been instrumental in winemaking, baking, and brewing since ancient times.
It produces ethanol by alcoholic fermentation.

A T cell is a type of lymphocyte.
T cells are one of the important white blood cells of the immune system and play a central role in the adaptive immune response.
T cells can be distinguished from other lymphocytes by the presence of a T-cell receptor (TCR) on their cell surface.

Recombinant vaccines are made of a live viral or bacterial vector.
It is engineered to express a variety of exogenous antigens in the cytoplasm of targeted T cells, in this case HIV-1 genes.
Hepatitis B vaccine is available for all age groups to prevent HBV infection.

Myosins are a superfamily of motor proteins best known for their roles in muscle contraction.
It aids in a wide range of other motility processes in eukaryotes.
They are ATP-dependent and responsible for actin-based motility. The term was originally used to describe a group of similar ATPases found in the cells of both striated muscle tissue and smooth muscle tissue.

A flexor is a muscle that flexes a joint.
It is a joint movement that decreases the angle between the bones that converge at the joint.
For example, one’s elbow joint flexes when one brings their hand closer to the shoulder.

The posterior Pituitary or neurohypophysis is a structure under direct regulation of hypothalamus.
The nuclei of hypothalamus accumulate Vasopressin and Oxytocin in this neurohypophysis.
It serves as release centre of these neurohormones.
Hence, the accumulation and release centre of neurohormones is ‘Posterior Pituitary lobe’.

Leeuwenhoek is universally acknowledged as the father of microbiology.
He discovered both protists and bacteria.
Leeuwenhoek is best known for his pioneering work in microscopy.
He also has contributions toward the establishment of microbiology as a scientific discipline.

Amphitrichous – a single flagellum at both poles of the organism.
For example we have Aquaspirillum serpens
Only one flagellum operates at a time, allowing the bacterium to reverse course rapidly by switching which flagellum is active.
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