Sickle cell anaemia is:
1. | an autosomal linked dominant trait |
2. | caused by substitution of valine by glutamic acid in the globin chain of haemoglobin |
3. | caused by a change in base pair of DNA |
4. | characterized by elongated sickle like RBCs with a nucleus |
If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is:
1. excretory fluid
2. coelomic fluid
3. haemolymph
4. slimy mucus
There is no DNA in:
1. | an enucleated ovum | 2. | mature RBCs |
3. | a mature spermatozoan | 4. | hair root |
Point mutation involves:
1. insertion
2. change in single base pair
3. duplication
4. deletion
Which one of the following has maximum genetic diversity in India?
1. Teak
2. Mango
3. Wheat
4. Tea
In a standard ECG, which one of the following alphabets is the correct representation of the respective activity of the human heart?
1. R-repolarisation of ventricles
2. S-start of systole
3. T-end of diastole
4. P-depolarisation of the atria
Study the pedigree chart given below:
What does it show?
1. | Inheritance of a sex-linked inborn error of metabolism |
2. | Inheritance of a condition like phenylketonuria as an autosomal recessive trait |
3. | The pedigree chart is wrong as this is not possible |
4. | Inheritance of a recessive sex-linked disease like haemophilia |
Middle lamella is mainly composed of:
1. hemicellulose
2. muramic acid
3. calcium pectate
4. phosphoglycerides
Somaclones are obtained by:
1. tissue culture
2. plant breeding
3. irradiation
4. genetic engineering
Which one of the following plants is monoecious?
1. | Marchantia | 2. | Pinus |
3. | Cycas | 4. | Papaya |