| 1081 |
Which structure is present in a plant cell but absent in an animal cell? |
Agriculture
Cell structure and cell division |
Easy |
| 1082 |
The replication of DNA in the cell cycle occurs during: |
Agriculture
Cell structure and cell division |
Medium |
| 1083 |
Meiosis is called reductional division because it: |
Agriculture
Cell structure and cell division |
Hard |
| 1084 |
In a DNA molecule, 20% of the bases are cytosine. What percentage are adenine? |
Agriculture
Genetic material |
Medium |
| 1085 |
Which base is found in RNA but not in DNA? |
Agriculture
Genetic material |
Easy |
| 1086 |
The double helix model of DNA was proposed by: |
Agriculture
Genetic material |
Easy |
| 1087 |
Guanine and cytosine in DNA are held together by: |
Agriculture
Genetic material |
Medium |
| 1088 |
The basic unit of chromatin, made of DNA wrapped around histone proteins, is the: |
Agriculture
Genetic material |
Hard |
| 1089 |
The genetic material of tobacco mosaic virus is: |
Agriculture
Genetic material |
Medium |
| 1090 |
The genotypic ratio in the F₂ of a monohybrid cross is: |
Agriculture
Mendel’s laws of inheritance |
Easy |
| 1091 |
How many different genotypes appear in the F₂ of a cross involving three independently assorting heterozygous… |
Agriculture
Mendel’s laws of inheritance |
Hard |
| 1092 |
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 |
| 1093 |
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 |
| 1094 |
Mendel observed independent assortment for the characters he analysed mainly because: |
Agriculture
Mendel’s laws of inheritance |
Medium |
| 1095 |
The phenotypic ratio of a dihybrid test cross (F₁ × double recessive) is: |
Agriculture
Mendel’s laws of inheritance |
Medium |
| 1096 |
Grain yield in wheat is an example of a: |
Agriculture
Quantitative inheritance |
Easy |
| 1097 |
In Nilsson-Ehle's wheat kernel colour cross with two gene pairs, the F₂ ratio was: |
Agriculture
Quantitative inheritance |
Medium |
| 1098 |
If a trait is controlled by three additive gene pairs, what fraction of the F₂ resembles one extreme parent? |
Agriculture
Quantitative inheritance |
Hard |
| 1099 |
Discontinuous variation is typical of characters that are: |
Agriculture
Quantitative inheritance |
Easy |
| 1100 |
How many phenotypic classes are expected in the F₂ when a trait is controlled by four additive gene pairs? |
Agriculture
Quantitative inheritance |
Medium |