| 1101 |
The proportion of observed variation in a trait that is due to genetic differences is called: |
Agriculture
Quantitative inheritance |
Medium |
| 1102 |
Triticale, the first man-made cereal, was developed by crossing: |
Agriculture
Plant breeding: history, objectives and methods |
Easy |
| 1103 |
The chemical commonly used to double the chromosome number in plants is: |
Agriculture
Plant breeding: history, objectives and methods |
Easy |
| 1104 |
Pure-line selection is best suited to: |
Agriculture
Plant breeding: history, objectives and methods |
Medium |
| 1105 |
The superiority of an F₁ hybrid over both its parents is called: |
Agriculture
Plant breeding: history, objectives and methods |
Easy |
| 1106 |
A breeder wants to transfer a single disease-resistance gene into an otherwise excellent variety. The most su… |
Agriculture
Plant breeding: history, objectives and methods |
Hard |
| 1107 |
Virus-free plants can be obtained through tissue culture of the: |
Agriculture
Plant breeding: history, objectives and methods |
Medium |
| 1108 |
The bacterium used as a natural vector to transfer genes into plants is: |
Agriculture
Plant biotechnology |
Easy |
| 1109 |
The insect-killing gene in Bt cotton is obtained from: |
Agriculture
Plant biotechnology |
Easy |
| 1110 |
Golden Rice was developed to increase the content of: |
Agriculture
Plant biotechnology |
Medium |
| 1111 |
Enzymes that cut DNA at specific base sequences are called: |
Agriculture
Plant biotechnology |
Medium |
| 1112 |
Selecting plants for a desired gene by testing their DNA rather than their appearance is called: |
Agriculture
Plant biotechnology |
Hard |
| 1113 |
What is the pH of a solution whose hydrogen ion concentration is 10⁻⁵ mol/L? |
Agriculture
pH and buffers |
Easy |
| 1114 |
A solution of pH 3 has how many times more hydrogen ions than a solution of pH 4? |
Agriculture
pH and buffers |
Medium |
| 1115 |
Which pair can form a buffer solution? |
Agriculture
pH and buffers |
Easy |
| 1116 |
For an acetic acid buffer (pKa = 4.76), what is the pH when the salt-to-acid ratio is 10? |
Agriculture
pH and buffers |
Hard |
| 1117 |
The main buffer system that keeps blood pH near 7.4 is the: |
Agriculture
pH and buffers |
Medium |
| 1118 |
Lactose, the sugar of milk, is made of: |
Agriculture
Biomolecules |
Easy |
| 1119 |
The bond linking amino acids in a protein is the: |
Agriculture
Biomolecules |
Easy |
| 1120 |
Which vitamin is water-soluble? |
Agriculture
Biomolecules |
Medium |