In which phase of mitosis does the nuclear envelope reform around the chromosomes? MCQ with Answer and Explanation

In which phase of mitosis does the nuclear envelope reform around the chromosomes?
A. Telophase
B. Prophase
C. Metaphase
D. Anaphase
Answer: Option A
Solution (By JKSSB Mock Tests)
During telophase, the chromatids reach the poles, decondense, and the nuclear envelope reassembles around each set, forming two daughter nuclei. The spindle disappears. Prophase involves nuclear envelope breakdown, metaphase aligns chromosomes, and anaphase separates chromatids. Cytokinesis often overlaps with telophase, dividing the cytoplasm.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Biology Questions

Question #1
Which blood vessel carries blood from the heart to the lungs?
A. Superior vena cava
B. Pulmonary artery
C. Pulmonary vein
D. Aorta

Correct Answer: Option B


Explanation:
The pulmonary artery (trunk) exits the right ventricle and carries deoxygenated blood to the lungs for oxygenation. The pulmonary veins return oxygenated blood from the lungs to the left atrium. The aorta distributes oxygenated blood to the body, and the vena cava returns deoxygenated blood to the heart.

This question belongs to: Science Biology
Question #2
In plant physiology, the 'Munch hypothesis' for the translocation of sugars in the phloem relies on the creation of a:
A. Transpiration pull
B. Root pressure
C. Turgor pressure gradient
D. Cohesion-tension force

Correct Answer: Option C


Explanation:
The Munch hypothesis, or mass flow hypothesis, explains the movement of sugars (primarily sucrose) through the phloem. It proposes that sugars are actively loaded into the phloem at the source (e.g., leaves), which lowers the water potential and causes water to enter from the xylem by osmosis. This creates a high turgor pressure. At the sink (e.g., roots, fruits), sugars are unloaded, increasing water potential, and water leaves the phloem, creating a low turgor pressure. The bulk flow of sap is driven by this turgor pressure gradient from source to sink.

This question belongs to: Science Biology
Question #3
Which of the following is a renewable natural resource?
A. Natural gas
B. Coal
C. Petroleum
D. Solar energy

Correct Answer: Option D


Explanation:
Solar energy is renewable and inexhaustible. Coal, petroleum, and natural gas are fossil fuels, which are non-renewable and finite.

This question belongs to: Science Biology