Biological organisation starts with
submicroscopic molecular level
cellular level
organismic level
organismic level
A.
submicroscopic molecular level
Biological organisation starts with submicroscopic molecular level, where four types of molecules, i.e. carbohydrates, lipids, proteins and nucleic acid are organised into organelles of cell.
Which one of the following not act as a neurotransmitter?
Acetylcholine
Epinephrine
Nor epinephrine
Nor epinephrine
Good vision depends on adequate intake of carotene rich food
Select the best option from the following statements
(a) Vitamin A derivatives are formed from carotene
(b)The photopigments are embedded in the membrane discs of the inner segment
(c) Retinal is a derivative of vitamin A
(d) Retinal is a light absorbing part of all the visual photopigments
(a) & (b)
(a), (c) & (d)
(a) & (c)
(a) & (c)
Bowman’s glands are located in the
proximal end of uriniferous tubules
anterior pituitary
female reproductive system of cockroach
female reproductive system of cockroach
Which one of the following pairs of structures distinguishes a nerve cell from other types of cells?
perikaryon and dendrites
vacuoles and fibres
flagellum and modulloary sheath
flagellum and modulloary sheath
Which one of the following statements is correct?
Neurons regulate endocrine activity, but not vice versa
Endocrine glands regulate neural activity, and nervous system regulates endocrine glands
Neither hormones control neural activity nor the neurons control endocrine activity
Neither hormones control neural activity nor the neurons control endocrine activity
Ultrasound of how much frequency is beamed into human body for sonography?
30-45 MHz
15-30 MHz
1-15 MHz
1-15 MHz
Bowman's glands are found in
olfactory epithelium
external auditory canal
cortical nephrons only
cortical nephrons only
Cornea transplant in humans is almost never rejected. This is because
its cells are least penetrable by bacteria
It has no blood supply
It is composed of enucleated cells
It is composed of enucleated cells
Which one of the following is a matching pair of a body feature and the animal possessing it?
Post-anal tail - Octopus
Ventral Central nervous system - Leech nervous system
Pharyngeal gill slits absent in embryo
Pharyngeal gill slits absent in embryo
