IGCSE Biology Paper-2: Specimen Questions with Answers 35 - 37 of 203

Question 35

Question MCQ▾

Figure shows a cell. Name the cell type.

What is the Type of Cell Given in the Figure?

Choices

Choice (4)

a.

Cardiac cell

b.

Ciliated cell

c.

Neuron cell

d.

Muscle cell

Edit

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.

Edit

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

Edit

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.