The Okazaki fragments in DNA chain growth:
| 1. | result in transcription |
| 2. | polymerize in the 3'-to-5' direction and forms replication fork |
| 3. | prove semi-conservative nature of DNA replication |
| 4. | polymerize in the 5'-to-3' direction and explain 3'-to-5' DNA replication |
The two polynucleotide chains in DNA are:
1. parallel
2. discontinuous
3. antiparallel
4. semiconservative
Which one of the following is a viral disease of poultry?
1. Salmonellosis
2. Coryza
3. Newcastle disease
4. Pasteurellosis
Inheritance of skin colour in humans is an example of:
| 1. | chromosomal aberration |
| 2. | point mutation |
| 3. | polygenic inheritance |
| 4. | codominance |
One gene-one enzyme relationship was established for the first time in:
1. Neurosporacrassa
2. Salmonella typhimurium
3. Escherichia coli
4. Diplococcuspneumonia
A genetically engineered micro-organism used successfully in the bioremediation of oil spills is a species of:
1. Pseudomonas
2. Trichoderma
3. Xanthomonas
4. Bacillus
In which one of the following preparations are you likely to come across cell junctions most frequently?
1. Ciliated epithelium
2. Thrombocytes
3. Tendon
4. Hyaline cartilage
Which one of the following pairs is mismatched?
| 1. | Pila globosa - pearl oyster | 2. | Apis indica- honey bee |
| 3. | Laccifer lacca- lac insect | 4. | Bombyx mori- silkworm |
About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and:
1. phosphorus and sulphur
2. sulphur and magnesium
3. magnesium and sodium
4. calcium and phosphorus
Two genes R and Y are located very close on the chromosomal linkage map of the maize plant. When RRYY and rryy genotypes are hybridized, then F2 segregation will show:
1. higher number of the recombinant types
2. segregation in the expected 9:3:3:1 ratio
3. segregation in a 3:1 ratio
4. higher number of the parental types
© 2026 GoodEd Technologies Pvt. Ltd.