The structure present in all adult vertebrates is
Notochord
Dorsal tubular nerve cord
Pharyngeal gill slits
All of these
B.
Dorsal tubular nerve cord
Dorsal tubular nerve cord is the characteristic feature of all adult vertebrate. It is a gel-like substance and is remnant of the notochord.
If due to some injury the chordate tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?
The flow of blood into the aorta will be slowed down
The ‘pace maker’ will stop working
The blood will tend to flow back into the left atrium
The flow of blood into the pulmonary artery will be reduced
Match the enzyme in column I with its function in column II and choose the correct option.
| Column I | Column II |
| A. Beta-Galactosidase | 1. Joining of DNA fragments |
| B. Permease | 2. Peptide Bond Formation |
| C. Ligase | 3. Hydrolysis of Lactose |
| D. Ribozyme | 4. Increases permeability to Beta-galactosidase |
A-2, B-1, C-4, D-3
A-3, B-2, C-1, D-4
A-2, B-4, C-1, D-3
A-1, B-2, C-4, D-3
In the central nervous system, myelinated fibres form the ….., while the non-myelinated fibre cells form the ……
Grey matter, white matter
White matter, grey matter
Ependymal cells, neurosecretory cells
Neurosecretory cell, ependymal cells
Haemoglobin is
An oxygen carrier in human blood
A protein used as a food supplement
An oxygen scavenger in root nodules
A plant protein with high lysine content
Which of the following tissue is a vascular?
Cowpait bone
Skeletal muscle
Stratified squamous epithelium
Adipose tissue
Many elements are found in living organisms either free or in form of compounds. One of the following is negligible is living organisms
Silicon
Magnesium
Iron
Sodium
Which of the following represent uridylic acid?
Uracil + Ribose
Uridine + Phosphoric acid
Uracil + Phosphoric acid
Uridine + Ribose + Phosphoric acid
Consider the following statements with two blanks X and Y and select the option which correctly fills up these blanks.
In the centre of the intervertebral disc, a soft area is present called ….X….....
Which is supposed to be remnant of …. Y....
X-Nucleus pulposus , Y-Nerve cord
X-Centrum, Y-Noto cord
X-Nucleus pulposus, Y-Noto cord
X-Centrum, Y-Nerve cord
