A DNA strand having nucleotide sequence A-T-G-C-T will have complementary strand:
- A-T-G-C-A
- T-A-C-G-A
- A-U-G-C-T
- G-C-A-T-A
Show answer and explanation
Answer: B. T-A-C-G-A
Base pairing (A-T, G-C) of A-T-G-C-T gives complementary strand T-A-C-G-A.
Matric Biology: Cell Cycle, questions with answers
Practise 26 real Federal Board questions on Cell Cycle from 2023 to 2026. See the answer and explanation as soon as you answer.
26real questions
8multiple choice
5exam sessions
About Cell Cycle in Matric Biology
Cell Cycle is one of the 15 main chapters in our Federal Board Matric Biology question bank (9th and 10th class), and about 7% of its real questions come from it. Tayyari Karo has 26 real questions on this chapter from 2023 to 2026; 8 are multiple choice and marked instantly, and the rest are short and long questions with a model answer. By difficulty: 23 medium, 3 easy.
Work through the questions below, then open the explanation for each one. Redo the ones you missed a few days later.
Try 8 real questions
These are real past-paper questions. Think of your answer first, then open the explanation.
In G1 phase of cell cycle:
- Nucleotides are formed
- DNA replicates
- Cell exits cell cycle
- Cell divides
Show answer and explanation
Answer: A. Nucleotides are formed
In G1, the cell grows and synthesises proteins/nucleotides in preparation for DNA replication in S-phase.
Which one CANNOT be a part of pyrimidine?
- Adenine
- Cytosine
- Thymine
- Uracil
Show answer and explanation
Answer: A. Adenine
Adenine is a purine, not a pyrimidine; cytosine, thymine and uracil are pyrimidines.
During translation, sequence of amino acids in the protein molecule is decided on the basis of sequence of nucleotides in:
- tRNA
- mRNA
- rRNA
- DNA
Show answer and explanation
Answer: B. mRNA
The mRNA codon sequence directly specifies the order of amino acids added during translation.
Removal of damaged cells during embryonic development is:
- Apoptosis
- Necrosis
- Cytokinesis
- Haemolysis
Show answer and explanation
Answer: A. Apoptosis
Apoptosis (programmed cell death) removes unwanted/damaged cells during development in an orderly way.
Crossing-over occurs between:
- Sister chromatids of the same chromosome
- Two different bivalents
- Non-sister chromatids of a bivalent
- Two daughter nuclei
Show answer and explanation
Answer: C. Non-sister chromatids of a bivalent
Crossing-over exchanges segments between non-sister chromatids of homologous chromosomes paired in a bivalent.
Briefly explain the role of meiosis in maintaining chromosome number in animals and plants.
Show model answer
Meiosis produces haploid (n) gametes from diploid (2n) parent cells by halving the chromosome number through one round of DNA replication followed by two nuclear divisions. When two haploid gametes fuse during fertilization, the normal diploid chromosome number is restored in the zygote. This halving-then-restoring cycle, repeated each generation, ensures that the chromosome number of a species remains constant from one generation to the next, in both animals and plants.
A scientist observes a cell with chromosomes aligned at the equator. Identify the phase and write its importance.
Show model answer
This is Metaphase. Importance: the alignment of chromosomes at the equator (metaphase plate), each attached to spindle fibres from both poles via its centromere, ensures that when the centromeres split in anaphase, each daughter cell receives an equal and identical set of chromosomes — this precise alignment is essential for accurate, error-free distribution of genetic material to the two daughter cells.
Sessions with Cell Cycle questions
| Session | Questions |
|---|---|
| 2026 Annual | 6 |
| 2025 1st Annual | 6 |
| 2025 2nd Annual | 4 |
| 2024 Annual | 6 |
| 2023 Annual | 4 |
Common questions
What does the Cell Cycle chapter cover on this page?
26 real Federal Board (FBISE) Biology questions on Cell Cycle from 2023 to 2026, for 9th and 10th class. Each one shows the session it came from.
Are the answers official?
No. We could not find an official FBISE marking scheme for these papers, so the answers and explanations are written by Tayyari Karo for practice. Check anything important with your teacher or textbook.
Is it free?
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