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Height of a plant is… (Class 10 Science SQP 2023-24, Q11)

questionbuddy.in/q/cbse-10-science-2023-24-sqp-q11-height-plant-regulated

ScienceCBSE Class 10 · Sample paper, session 2023-24 · 1 mark · MCQ

CBSE Class 10 Science sample paper 2023-24: question 11

From the official CBSE sample question paper for 2023-24, section A, question 11, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q11 · 1 mark · MCQHeredity

Height of a plant is regulated by:

  1. (A)DNA which is directly influenced by growth hormone.
  2. (B)Genes which regulate the proteins directly.
  3. (C)Growth hormones under the influence of the enzymes coded by a gene.
  4. (D)Growth hormones directly under the influence a gene.

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2023-24.

Hints

Open one hint at a time and try again before the next.

Hint 1

Genes make proteins.

Hint 2

Think about the link between an enzyme and the amount of hormone produced.

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. A gene codes for a protein, often an enzyme.

  2. That enzyme controls how much growth hormone is made, and the amount of hormone decides the height of the plant. So the answer is option (C).

    1 mark

Answer: Option (C)

Where the marks are

  • Recognises the gene → enzyme → growth hormone → height sequence (1 mark)

Revise the chapter

  • Chapter: Heredity (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Heredity, one at a time, marked against the answer key and marking points.Back to the full paperSample paper 2023-24: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.