Growth Questions

Objective questions

In which phase of mitosis do chromosomes become visible as paired chromatids?

(A) Prophase (B) Metaphase (C) Anaphase (D) Telophase

Correct Answer: (A) Prophase

During which phase do chromosomes align at the cell’s equator?

(A) Prophase (B) Metaphase (C) Anaphase (D) Telophase

Correct Answer: (B) Metaphase

What structure is responsible for pulling sister chromatids apart during mitosis?

(A) Centrioles (B) Spindle fibers (C) Nuclear envelope (D) Chromatids

Correct Answer: (B) Spindle fibers

In which stage of mitosis do sister chromatids separate and move to opposite poles?

(A) Prophase (B) Metaphase (C) Anaphase (D) Telophase

Correct Answer: (C) Anaphase

What happens during telophase in mitosis?

(A) Chromosomes condense and become visible. (B) Chromosomes align at the equator. (C) Nuclear envelopes reform around each set of chromosomes. (D) Spindle fibers attach to centromeres.

Correct Answer: (C) Nuclear envelopes reform around each set of chromosomes.

What is cytokinesis?

(A) The division of the nucleus. (B) The division of the cytoplasm. (C) The alignment of chromosomes. (D) The separation of chromatids.

Correct Answer: (B) The division of the cytoplasm.

At which phase does the nuclear envelope disappear?

(A) Interphase (B) Prophase (C) Anaphase (D) Telophase

Correct Answer: (B) Prophase

Which phase of the cell cycle does mitosis immediately follow?

(A) G1 phase (B) S phase (C) G2 phase (D) Cytokinesis

Correct Answer: (C) G2 phase

What structure forms during mitosis to ensure chromosomes are evenly divided between daughter cells?

(A) Cell wall (B) Spindle apparatus (C) Centromere (D) Ribosome

Correct Answer: (B) Spindle apparatus

What is the result of mitosis?

(A) Four non-identical daughter cells (B) Two genetically identical daughter cells (C) Four genetically identical daughter cells (D) Two non-identical daughter cells

Correct Answer: (B) Two genetically identical daughter cells

Which of the following is an external factor affecting growth?

A) Hormones B) Enzymes C) Temperature D) DNA

Correct Answer: C) Temperature

How does pH influence growth?

A) It speeds up metabolism regardless of levels. B) It inhibits all cellular activity. C) It affects cellular activities depending on optimal levels. D) It has no effect on growth.

Correct Answer: C) It affects cellular activities depending on optimal levels.

What happens when there is an accumulation of toxic substances during growth?

A) Growth is enhanced. B) Growth is inhibited. C) Cells undergo differentiation. D) Photosynthesis increases.

Correct Answer: B) Growth is inhibited.

Why is light an important factor in plant growth?

A) It directly controls cell division. B) It provides energy for photosynthesis. C) It eliminates toxic substances. D) It maintains body temperature.

Correct Answer: B) It provides energy for photosynthesis.

What is the function of auxins in plants?

A) Promote seed germination. B) Stimulate or inhibit cell elongation. C) Enhance photosynthesis. D) Prevent root formation.

Correct Answer: B) Stimulate or inhibit cell elongation.

Which hormone in plants is responsible for stem elongation?

A) Auxins B) Cytokinins C) Gibberellins D) Abscisic acid

Correct Answer: C) Gibberellins

What is the primary role of thyroxine in animals?

A) Stimulate blood clotting. B) Regulate metabolism and growth. C) Aid in digestion. D) Promote immune response.

Correct Answer: B) Regulate metabolism and growth.

Which hormone, secreted by the pituitary gland, is essential for overall growth in animals?

A) Thyroxine B) Insulin C) Pituitrin (Somatropin) D) Adrenaline

Correct Answer: C) Pituitrin (Somatropin)

What is the term for the enlargement of cells during growth?

A) Cell division B) Cell elongation C) Cell differentiation D) Cell specialization

Correct Answer: B) Cell elongation

Which region in plants is responsible for active cell division?

A) Region of elongation B) Region of maturation C) Apical meristem D) Epidermal layer

Correct Answer: C) Apical meristem

Theory Questions

State four factors that affect growth

Explain the differences between growth in plants and animals

Define growth

Mention two growth hormones each in plants and animals

How can growth be measured?