When all the active sites of the enzyme are occupied, how does increasing the substrate concentration affect the rate ofreaction?
The rate of reaction will slow down
The rate of reaction will become constant, and shows no increase
The rate of reaction will increase with increasing substrate concentration
The rate of reaction will become reactive in such condition
B.
The rate of reaction will become constant, and shows no increase
An increase in substrate concentration when no active sites are available would not be able to speed up the initial rate of reacton and rate of reaction will become constant.
Study the following and identify the incorrect statements.
I. Muscles of the iris end ciliary body are the smooth muscles of mesodermal origin.
II. Slow and sustained involuntary contractions of smooth muscles are called spasms.
III. Quiescent mononucleate myogenic cells of skeletal muscles are called pericytes.
IV. The skeletal muscle fibre is multinucleate and is a synctium.
I, IV
II, IV
III, IV
I, III
Chylomicrons are
micelles covered by a protein coat
droplets along with triglycerides
triglycerides along with monosaccharides
glycerol droplets formed in intestine after digestion of fats
Haemocyanin pigment is found in which of the following animal group?
Annelida
Insects
Lower invertebrates
Platyheliminthes
Which of the following statement is true for maculae found in the internal ear of humans?
It is present in ampullae of semicircular ducts
These are three in number
Each macula contains calcarious ear stones called oto lith.
All of above
Match the following Columns
| Column I | Column II |
| A. Pisiform bone | i. Ruminants |
| B. Fibrous cartilage | ii. Wrist bone |
| C. Hyaline cartilage | iii. Intervertebral discs |
| D. OS- cardis |
iv. Larynx v. Pinna |
The correct answer is
A - ii; B - iii; C - iv; D - v
A - v; B - ii; C - i; D - iv
A - iv; B - iii; C - ii; D - i
A - v; B - ii; C - iii; D - iv
Myelin sheaths
are abundant in the nervous system of non-vertebrates
consists largely of lipids
has a low electric resistance
allow the continous conduction of impulse
The disease characterised by high plasma Na+, low plasma K+ rise in blood volume and high blood pressure is
Cushing syndrome
Gull's disease
Aldosteronism
Adrenal Virilism
Clogging ofnarrowed vessels by blood clots is called
vasoconstriction
artherosclerosis
thrombosis
stroke
