Start learning →

UP Board Class 10 Cell: Structure and Functions — practice questions — page 2

Explore 49 free Cell: Structure and Functions questions in UP Board Class 10 Science. Open each question or exercise to read its content, reference answers and available explanation.

Practise Cell: Structure and Functions with Quill →

Cell: Structure and Functions questions and exercises with answers

Showing questions 31–49 of 49.

A diploid cell with 2n = 8 undergoes meiosis. Number of chromosomes in each daughter cell after meiosis II completion:Read the answer and worked solution →Number of bivalents (paired homolog pairs) at metaphase I of a cell with 2n = 12:Read the answer and worked solution →DNA content at various cell cycle phases (C = haploid DNA content):Read the answer and worked solution →A feature common to plant sieve-tube cells and mature mammalian RBCs isRead the answer and worked solution →The 'powerhouse of the cell' is theRead the answer and worked solution →A feature common to prokaryotes and many eukaryotes (e.g. plants, fungi) isRead the answer and worked solution →Which organelle is the site of protein synthesis?Read the answer and worked solution →According to the fluid-mosaic model, the cell membrane is composed mainly ofRead the answer and worked solution →Which is absent in a prokaryotic cell?Read the answer and worked solution →Genetic material in a eukaryotic cell is primarily located in theRead the answer and worked solution →The cell theory was NOT proposed byRead the answer and worked solution →Which cell organelle contains hydrolytic enzymes for intracellular digestion?Read the answer and worked solution →Plant cells differ from animal cells in havingRead the answer and worked solution →The endoplasmic reticulum studded with ribosomes is calledRead the answer and worked solution →Cells that possess a membrane-bound, well-organised nucleus are called:Read the answer and worked solution →Cells that lack a membrane-bound nucleus are called:Read the answer and worked solution →The scientist who first observed and described a living cell was:Read the answer and worked solution →The nucleus of the cell was discovered by:Read the answer and worked solution →Ribosomes are organelles that are:Read the answer and worked solution →

Worked practice questions

A diploid cell with 2n = 8 undergoes meiosis. Number of chromosomes in each daughter cell after meiosis II completion:

  1. 4 (haploid, n)
  2. 2
  3. 8
  4. 16
Show answer and solution

Correct answer: A. 4 (haploid, n)

2n = 8 → n = 4. Meiosis I: reduces to 4 chromosomes per cell (each with 2 chromatids). **Meiosis II:** separates sister chromatids → each daughter has 4 chromosomes (1 chromatid each). 4 haploid cells per diploid starting cell.

Open this question →

Number of bivalents (paired homolog pairs) at metaphase I of a cell with 2n = 12:

  1. 3
  2. 24
  3. 6 (n bivalents, where n = 6 since 2n = 12)
  4. 12
Show answer and solution

Correct answer: C. 6 (n bivalents, where n = 6 since 2n = 12)

**Bivalents (tetrads):** pairs of homologous chromosomes held together. For 2n=12, n=6 bivalents. Each bivalent has 4 chromatids. Visible at metaphase I aligned at equator. Reductional division separates the two homologs.

Open this question →

DNA content at various cell cycle phases (C = haploid DNA content):

  1. G1 = 2C, S = 4C → 4C, G2 = 4C, end of M = 2C per daughter
  2. G1 = C
  3. All same
  4. G1 = 2C, S = 4C, G2 = 4C, end of mitosis = 2C
Show answer and solution

Correct answer: A. G1 = 2C, S = 4C → 4C, G2 = 4C, end of M = 2C per daughter

**Track DNA:** G1 (2C, before replication). S: 2C → 4C (gradual). G2 (4C, replication complete). **Mitosis:** 4C divided to 2C per daughter. **Chromosome count differs:** 2n in G1, G2, daughters still 2n in mitosis (counting chromosomes, not chromatids).

Open this question →

How to practise

  1. Choose a Cell: Structure and Functions question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Cell: Structure and Functions practice for UP Board Class 10. Read explanations as you go. No signup form needed to start.

Practise Cell: Structure and Functions →

More Science topics

Refraction of Light and LensesEffects of Electric CurrentChemical Reactions and EquationsLife Processes in Living Organisms Part 2Metals and Non-metalsLife Processes in Living Organisms Part 1Environmental & Disaster ManagementHeredity and Evolution