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Q. No.The structure of collagen, discovered by G. N. Ramachandran, is described as:
1. A left-handed alpha helix
2. A beta pleated sheet
3. A double helix
4. A triple helix
1. A left-handed alpha helix
2. A beta pleated sheet
3. A double helix
4. A triple helix
From NCERT
Subtopic: Introduction to Cell |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven below are two statements:
| Assertion (A): | It is important that the organisms should have cells. |
| Reason (R): | A cell keeps its chemical composition steady within its boundary. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
From NCERT
Subtopic: Introduction to Cell |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConsider the given two statements:
| Statement I: | In 1838, Matthias Schleiden, a German botanist, examined a large number of plants and observed that the presence of cell wall is a unique character of the plant cells. |
| Statement II: | In 1839, Theodor Schwann, a British Zoologist, studied different types of animal cells and reported that cells had a thin outer layer which is today known as the ‘plasma membrane’. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
From NCERT
Subtopic: Cell Theory |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHow many of the given statements are true?
1. 1
2. 2
3. 3
4. 4
| I: | All cells arise from pre-existing cells. |
| II: | Prokaryotic cells do not have any organelles. |
| III: | Eukaryotic cells have only membrane bound organelle. |
| IV: | Centrosome helps in cell division in plants and animals. |
2. 2
3. 3
4. 4
Subtopic: Cell Theory | Eukaryotic Cell Orgenelle | Lysosomes | Ribosome and Inclusion Bodies |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConsider the given two statements:
1. Statement I is True; Statement II is True
2. Statement I is True; Statement II is False
3. Statement I is False; Statement II is True
4. Statement I is False; Statement II is False
| Statement I: | Rudolph Virchow proved that all life comes from pre-existing life. |
| Statement II: | Louis Pasteur proved that all cells arise from pre-existing cells |
2. Statement I is True; Statement II is False
3. Statement I is False; Statement II is True
4. Statement I is False; Statement II is False
From NCERT
Subtopic: Cell Theory |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyRead carefully: Select the location with respect to a eukaryotic cell where ribosomes are not expected to be found?
1. in the cytoplasm
2. within the chloroplasts (in plants)
3. within the mitochondria
4. within the rough ER.
1. in the cytoplasm
2. within the chloroplasts (in plants)
3. within the mitochondria
4. within the rough ER.
From NCERT
Subtopic: Eukaryotic Cell Orgenelle |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyRibosomes are the site of protein synthesis. Identify the correct statement:
| I: | Several ribosomes may attach to a single mRNA and form a chain called polyribosomes or polysome. |
| II: | The ribosomes of a polysome translate the mRNA into different proteins. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
From NCERT
Subtopic: Ribosome and Inclusion Bodies |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyRegarding the genetic material in prokaryotes:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | The main chromosomal DNA is linear |
| II: | Plasmid DNA is circular |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Details of Prokaryotic Cell Structure |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConsider the two statements:
| Statement I: | Besides flagella, Pili and Fimbriae are also surface structures of the bacteria but do not play a role in motility. |
| Statement II: | Pili and fimbriae help attach the bacteria to rocks in streams and also to the host tissues. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
From NCERT
Subtopic: Details of Prokaryotic Cell Structure |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify the correct statement regarding the part of a cell, the structure of which is shown in the given diagram:
| 1. | It is not found in the plant cells |
| 2. | It serves to provide an attachment with a surface for a bacterial cell |
| 3. | The structure is made of a protein called flagellin |
| 4. | It can be used for movement by a eukaryotic cell |
From NCERT
Subtopic: Cilia & Flagella |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect Chapter Topics:
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