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Science (English Medium) Class 12 - CBSE Question Bank Solutions for Biology

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Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?

[2] Human Reproduction
Chapter: [2] Human Reproduction
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Menstruation is triggered by a sudden decline in the amount of hormone secreted by corpus luteum. Identify the hormone.

[2] Human Reproduction
Chapter: [2] Human Reproduction
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Level of which hormones are at their highest during the luteal phase (second half of the cycle) of the menstrual cycle?

[2] Human Reproduction
Chapter: [2] Human Reproduction
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Corpus luteum develops from ______.

[2] Human Reproduction
Chapter: [2] Human Reproduction
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Corpus luteum ______.

[2] Human Reproduction
Chapter: [2] Human Reproduction
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Mature Graafian follicle is generally present in the ovary of a healthy human female around stet ______.

[2] Human Reproduction
Chapter: [2] Human Reproduction
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Which one of the following statements is incorrect about menstruation?

[2] Human Reproduction
Chapter: [2] Human Reproduction
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The first genetic material could be ______.

[5] Molecular Basis of Inheritance
Chapter: [5] Molecular Basis of Inheritance
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Which of the following are the functions of RNA?

[5] Molecular Basis of Inheritance
Chapter: [5] Molecular Basis of Inheritance
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Segments of mRNA removed during splicing are called ______.

[5] Molecular Basis of Inheritance
Chapter: [5] Molecular Basis of Inheritance
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In eukaryotes, mRNA is synthesized with the aid of ______.

[5] Molecular Basis of Inheritance
Chapter: [5] Molecular Basis of Inheritance
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Which one of the following events is correctly matched with the time period in a normal menstrual cycle?

[2] Human Reproduction
Chapter: [2] Human Reproduction
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A human female reaches menopause aroung the age of ______.

[2] Human Reproduction
Chapter: [2] Human Reproduction
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The endometrium in the female is the lining of ______.

[2] Human Reproduction
Chapter: [2] Human Reproduction
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Proliferative phase of menstrual cycle, is also called ______.

[2] Human Reproduction
Chapter: [2] Human Reproduction
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To answer the question, study the graphs below for Subjects 1 and 2 showing different levels of certain hormones.

 

The peak observed in Subject 1 and 2 is due to ______ 

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.

  HORMONE A HORMONE B
Subject 1 Shows a peak on the 14th Day of the menstrual cycle. Falls down during the luteal phase.
Subject 2 Shows a peak on the 14th Day of the menstrual cycle. The level is maintained high in the luteal phase.

The peak observed in Subject 1 and 2 is due to ______ 

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.

  HORMONE A HORMONE B
Subject 1 Shows a peak on the 14th Day of the menstrual cycle. Falls down during the luteal phase.
Subject 2 Shows a peak on the 14th Day of the menstrual cycle. The level is maintained high in the luteal phase.

Subject 2 has a higher level of hormone B, which is ______

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.

  HORMONE A HORMONE B
Subject 1 Shows a peak on the 14th Day of the menstrual cycle. Falls down during the luteal phase.
Subject 2 Shows a peak on the 14th Day of the menstrual cycle. The level is maintained high in the luteal phase.

If the peak of Hormone A does not appear in the study for Subject 1, which of the following statement is true?

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.

  HORMONE A HORMONE B
Subject 1 Shows a peak on the 14th Day of the menstrual cycle. Falls down during the luteal phase.
Subject 2 Shows a peak on the 14th Day of the menstrual cycle. The level is maintained high in the luteal phase.

Which structure in the ovary will remain functional in subject 2?

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined
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