What would not take place if chromaffin cells of adrenal medulla undergoes oncogenesis?
High blood sugar and glucosuria
High BMR
Pheochromocytomas
Low blood pressure
One key function of nuclear pores is to
aid in the production of new nuclei
allow cells to communicate with each other
form connections between different organelles
allow molecules like protein to move in and out of the nucleus
From the following pairs regarding the type of animal tissue with its location. Choose the incorrect ones.
Pseudo stratified epithelium - Eustachian tube
Keratinized stratified epithelium - Conjunctiva of eyes
Squamous epithelium - Alveoli of lungs
Cuboidal epithelium - Pancreatic ducts
In biosystematics, the basis of classification is
major morphological characters
cytological characters
evolutionary history considering various parameters from different fields of studies
phenotypic relationships between species
Match the disease in column I with their characteristic symptoms in column II caused in brain.
Column I | Column II |
A. Parkinson's disease | 1. Refers to lack of muscle coordination. Damage to cerebellum is a characteritic symptom |
B. Dyslexia | 2. Refers to the destruction of myelin sheath of neuron of CNS |
C. Alaxia | 3. It is characterized by tremors and progressive rigidity of limbs caused by degeneration of neurons |
D. Multiple sclerosis | 4. Involves an inability of an individual to comprehend the written language |
A - 2; B - 4; C - 3; D - 1
A - 3; B - 2; C - 1; D - 4
A - 4; B - 3; C - 2; D - 3
A - 3; B - 4; C - 1; D - 2
Read the following statements about dentition.
I. Dentistry refers to the study of teeth.
II. Endodontics is the prevention and correction of abnormally aligned teeth.
III. Orthodontics is the treatment of abnormal conditions of tissues immediately surrounding the teeth.
IV. Periodontics is the prevention, diagonsis and treatment of dental diseases.
Choose the correct explanation.
Only I
I and II
II and III
I, II, III and IV
Polysaccharides, polypeptides and polynucleotides have in common that they all
contain amino acid
are formed in condensation reactions
contain nitrogen
come out in acid soluble pool
Select the correct statements out of the four (I-IV) given below about lac operon.
I. Glucose or galactose may bind with the repressor and inactivate it.
II. In the absence of lactose, the repressor binds with the operator region.
III. The Z-gene codes for permease.
IV. This was elucidated by Francois Jacob and Jacques Monad.
The correct statements are
II and III
I and III
II and IV
I and II
In Zostera, the marine angiosperm, the pollen grains are long ribbon-like and without exine. They have same specific gravity as that of water. How is this feature helpful in their pollination?
The pollen grains become unwettable
The pollen grains spread over large and they are lighter
The pollen grains can float below the surface of water
None of the above
C.
The pollen grains can float below the surface of water
In Zostera, the marine angiosperm, the pollen grains are long ribbon-like and without exine. They have some specific gravity as that of water. The pollen grains can therefore, float below the surface of water. This helps in their pollination.
Match the following column I with column II
Column I (Genes) | Column II (Types) |
A. Genes for glycolysis | 1. Pseudogenes |
B. Genes for nitrate reductase | 2. Multigenes |
C. Globin gene family | 3. House keeping genes |
D. mRNA gene | 4. Inducible genes |
A - 4; B - 3; C - 1; D - 2
A - 3; B - 4; C - 2; D - 1
A - 1; B - 2; C - 4; D - 3
A - 2; B - 1; C - 3; D - 4