Wired Faculty
Sponsor Area
Vitamin B6 is also called
thiamine
pantothenic acid
pyridoxine
retinol
C.
pyridoxine
Vitamin B6 is known as Pyridoxine. It is widely distributed in cereal grains, yeast, liver, milk etc. It is a constituent of a coenzyme (pyridoxal phosphate) involved in amino acid metabolism. Its deficiency causes retarted growth, dermatitis, convulsions and other symptoms.
Sponsor Area
Protista differs from monera in having
cell wall
autotrophic nutrition
flagella
nuclear membrane
D.
nuclear membrane
All single-celled eukaryotes are placed under protista. Phylogenetically the kingdom protista acts as a connecting link between the prokaryotic kingdom-Monera and the complex multicellular kingdoms- Fungi, Plantae and Animalia.
Protistan cell body has a well defined nucleus and other membrane- bound organelles. It is surrounded by plasmalemma (cell membrane). It consists of cilia and flagella. It has nucleus, nucleolus and nucleoplasm. Monerans lack nuclear membrane.
Why are vascular bundles closed in monocots?
Xylem and phloem are present.
Xylem and phloem occur in separate bundles.
Vascular cambium is present between xylem and phloem.
Vascular cambium is not present.
D.
Vascular cambium is not present.
The vascular system consists of complex tissues, the phloem and the xylem.
The xylem and phloem together constitute vascular bundles. In dicotyledonous stems, cambium is present between phloem and xylem. Such vascular bundles because of the presence of cambium possess the ability to form secondary xylem and phloem tissues, and hence are called open vascular bundles. In the monocotyledons, the vascular bundles have no cambium present in them. Hence, since they do not form secondary tissues so they are referred to as closed.
Who invented electron microscope?
Janssen
Edison
Knoll and Ruska
Landsteiner
C.
Knoll and Ruska
The Electron microscope was discovered by Max Knoll and Ernst Ruska at the Berlin Technische Hochschule in 1931. It was the first practical demonstration of the principles of electron microscopy.
What do A, B, C and D represent in the following figure?
A : carrier protein, B: symport, C: uniport, D : antiport
A : carrier protein, B : uniport, C: antiport, D : symport
A: carrier protein, B: antiport, C: symport, D : uniport
A : carrier protein, B: uniport, C: symport, D : antiport
B.
A : carrier protein, B : uniport, C: antiport, D : symport
Carrier proteins are integral membrane proteins that exist within and span the membrane across which they transport substances.
Uniport is an integral membrane protein that transports a single type of substrate species and moves in a single direction.
An antiport is an integral membrane transport protein that simultaneoulsy transports two different molecules in the opposite direction.
Symport is the movements of two substances that moves in the same direction.
Sponsor Area
Mock Test Series
