Semen is the mixture of sperms and secretions from seminal vesicles, prostate and cowper's glands. It is a milky fluid. Its average amount is 2 - 3 ml in a single ejaculation and contains 200000000 - 400000000 sperms.

Given below is a diagram depicting the cell cycle. Study the same and then answer the question: What is meant by DNA replication which occurs during the interphase stage?

Interphase is the longest stage of cell cycle. During interphase, the cell acquires nutrients, creates and uses proteins and other molecules, and starts the process of cell division by replicating the DNA. During S phase of the interphase, each DNA molecule duplicates in readiness for their equitable distribution in the daughter cells during the mitosis. For replication, the DNA double helix opens at one end, making the two strands free to which new strands begin to form and the process continues in a sequence for the whole length of the DNA.

Given below is a diagram depicting the cell cycle. Study the same and then answer the question: Mention any three identifying features of the prophase stage.

Three identifying features of the prophase stage are listed below: The chromosomes have become short and thick and are clearly visible inside the nucleus. The two sister chromatids remain attached to each other at a small region called centromere. The nuclear membrane and the nucleolus disappear.

Given below is a diagram depicting the cell cycle. Study the same and then answer the questions that follow: Draw a neat labelled diagram of the metaphase stage of an animal cell having six chromosomes.

Fig: Metaphase stage in Mitosis. Metaphase is defined as the point at which all of the chromosome pairs are fully condensed, attached to the mitotic spindle, and aligned at the center—termed the “metaphase plate.”

Given below is a diagram depicting the cell cycle. Study the same and then answer the question: Mention two events occurring in the nucleus during the Anaphase stage.

Anaphase is the third phase of the karyokinesis in mitosis. Two events occurring in the nucleus during the Anaphase stage are listed below: Centromere splits and the sister chromatids separate each other. The two sister chromatids of each chromosome separate and are drawn apart towards opposite poles pulled by shortening of spindle fibres.

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Concise Biology Part-II Class 10>Chapter 17 - Sample Paper 1>SAMPLE PAPER>Q 5

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What is semen?

Important Questions on Sample Paper 1

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Concise Biology Part-II Class 10>Chapter 17 - Sample Paper 1>SAMPLE PAPER>Q 5

Mention the location of stroma and state its function. (In case of plants)

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Concise Biology Part-II Class 10>Chapter 17 - Sample Paper 1>SAMPLE PAPER>Q 5

Mention the location of Chordae tendinae and state its function.

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Concise Biology Part-II Class 10>Chapter 17 - Sample Paper 1>SAMPLE PAPER>Q 5

Mention the location of auxin and state its function.

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Concise Biology Part-II Class 10>Chapter 17 - Sample Paper 1>SAMPLE PAPER>Q 5

Mention the location of Mitral valve and state its function.

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Concise Biology Part-II Class 10>Chapter 17 - Sample Paper 1>SAMPLE PAPER>Q 6

Given below is a diagram depicting the cell cycle. Study the same and then answer the question:
Question Image
What is meant by DNA replication which occurs during the interphase stage?

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10th ICSE

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Concise Biology Part-II Class 10>Chapter 17 - Sample Paper 1>SAMPLE PAPER>Q 6

Given below is a diagram depicting the cell cycle. Study the same and then answer the question:
Question Image
Mention any three identifying features of the prophase stage.

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10th ICSE

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Concise Biology Part-II Class 10>Chapter 17 - Sample Paper 1>SAMPLE PAPER>Q 6

Given below is a diagram depicting the cell cycle. Study the same and then answer the questions that follow:
Question Image
Draw a neat labelled diagram of the metaphase stage of an animal cell having six chromosomes.

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10th ICSE

IMPORTANT

Concise Biology Part-II Class 10>Chapter 17 - Sample Paper 1>SAMPLE PAPER>Q 6

Given below is a diagram depicting the cell cycle. Study the same and then answer the question:
Question Image
Mention two events occurring in the nucleus during the Anaphase stage.

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