IGCSE Biology Paper-2: Specimen Questions with Answers 35 - 37 of 203
Question 35
Question MCQ▾
Figure shows a cell. Name the cell type.
Choices
Choice (4) | |
---|---|
a. | Cardiac cell |
b. | Ciliated cell |
c. | Neuron cell |
d. | Muscle cell |
Answer
c.Explanation
The brain and spinal cord are buildup of many cells, including neurons and glial cells. Neurons are cells that transfer electro-chemical signals to and from the brain and nervous system.
Question 36
Question MCQ▾
Write down the correct sequence of mitosis
Choices
Choice (4) | |
---|---|
a. | Interphase ⇾ prophase ⇾ metaphase ⇾ telophase ⇾ interphase |
b. | |
c. | |
d. |
Answer
d.Explanation
Mitosis is a portion of the cell cycle in which chromosomes in a cell nucleus separated into two identical sets of chromosomes, each in its own nucleus. Mitosis is simply described as having five stages — Interphase, prophase, metaphase, anaphase, and telophase; the steps follow one another without interruption.
Question 37
Question MCQ▾
The conversion of ammonia to nitrate is known as-
Choices
Choice (4) | |
---|---|
a. | Nitrification |
b. | Nitrogen fixation |
c. | Ammonification |
d. | Denitrification |
Answer
a.Explanation
The conversion of ammonia into nitrate is called nitrification. Nitrification process occur in the presence of soil-living bacteria and other nitrifying bacteria. In the primary stage of nitrification, bacteria such as the Nitrosomonas species, which converts ammonia to nitrites, perform the oxidation of ammonium.