| 21 |
El Niño conditions in the Pacific Ocean are commonly associated with: |
Agriculture
Monsoon in India |
Hard |
| 22 |
The word monsoon is derived from an Arabic word meaning: |
Agriculture
Monsoon in India |
Easy |
| 23 |
Crossing over between homologous chromosomes takes place during: |
Agriculture
Cell structure and cell division |
Easy |
| 24 |
Maize has 2n = 20. How many chromosomes are present in each of its egg cells? |
Agriculture
Cell structure and cell division |
Medium |
| 25 |
Mitosis in a diploid cell produces: |
Agriculture
Cell structure and cell division |
Easy |
| 26 |
Which structure is present in a plant cell but absent in an animal cell? |
Agriculture
Cell structure and cell division |
Easy |
| 27 |
The replication of DNA in the cell cycle occurs during: |
Agriculture
Cell structure and cell division |
Medium |
| 28 |
Meiosis is called reductional division because it: |
Agriculture
Cell structure and cell division |
Hard |
| 29 |
In a DNA molecule, 20% of the bases are cytosine. What percentage are adenine? |
Agriculture
Genetic material |
Medium |
| 30 |
Which base is found in RNA but not in DNA? |
Agriculture
Genetic material |
Easy |
| 31 |
The double helix model of DNA was proposed by: |
Agriculture
Genetic material |
Easy |
| 32 |
Guanine and cytosine in DNA are held together by: |
Agriculture
Genetic material |
Medium |
| 33 |
The basic unit of chromatin, made of DNA wrapped around histone proteins, is the: |
Agriculture
Genetic material |
Hard |
| 34 |
The genetic material of tobacco mosaic virus is: |
Agriculture
Genetic material |
Medium |
| 35 |
The genotypic ratio in the F₂ of a monohybrid cross is: |
Agriculture
Mendel’s laws of inheritance |
Easy |
| 36 |
How many different genotypes appear in the F₂ of a cross involving three independently assorting heterozygous… |
Agriculture
Mendel’s laws of inheritance |
Hard |
| 37 |
A tall pea plant crossed with a dwarf plant gives 50% tall and 50% dwarf offspring. The tall parent was: |
Agriculture
Mendel’s laws of inheritance |
Medium |
| 38 |
The law that states that the two factors of a pair separate during gamete formation is the law of: |
Agriculture
Mendel’s laws of inheritance |
Easy |
| 39 |
Mendel observed independent assortment for the characters he analysed mainly because: |
Agriculture
Mendel’s laws of inheritance |
Medium |
| 40 |
The phenotypic ratio of a dihybrid test cross (F₁ × double recessive) is: |
Agriculture
Mendel’s laws of inheritance |
Medium |