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Biology GK · all questions

Cell Biology
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The structural elements of cytoplasm include

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RNA differs from DNA in having

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Consider the following statements regarding prophase I and choose the correct answer:
1. Progressive condensation and coiling of chromatin fibres occur at Leptonema stage
2. Two homologous chromosomes each derived from one parent during sexual reproduction come together and form pairs during Zygonema stage
3. Crossing over takes place during Diplonema stage
4. The nucleolus and nuclear envelope disappear and a spindle begins to be formed at the end of Diakinesis stage

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Which one of the following is not found in animal cells?

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Consider the following statements regarding the functions of Golgi complex and choose the correct answer:
1. Synthesizes and secretes polysaccharides
2. Takes part in sulphate metabolism (Sulphation)
3. Synthesizes ATP to produce energy for the cell
4. Takes part in the formation of primary Iysosomes

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Which of the following have been called as mobile electron carriers?

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The innermost portion of a mature plant cell wall is the

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The layer common to two adjacent cells called MIDDLE LAMELLA is composed of

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Which one of the following organelles of mammalian cell is rich in hydrolytic enzymes?

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Which cell organelle has a central core of a crystalline material called a nucleoid composed of urate oxidase crystals?

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Match the following columns.
Column I Column II
a. Nucleolus 1. Lipid storage
b. Spherosomes 2. Detoxification
c. Peroxisomes 3. Transport of macromolecules
d. Plasmodesmata 4. RNA synthesis

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Microtubules were first discovered by

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Consider the following statemens.
1. Endoplasmic Reticulum (ER) is called as 'skeleton of cell'.
2. ER is divided into three types according to presence or absence of ribosome
3. Smooth ER is rich in actively protein secreting cells.
Which of the statemen(s) given above is/are correct?

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Which one of the following cell organelles is known as 'suicidal bags' of a cell?

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Which of the following statements are correct regarding common differences between plant and animal cells?
1. Plant cells have cellulose cell wall, while animal cells lack it.
2. Plant cells lack plasma membrane, while animal cells have it.
3. Mature plant cell have a large vacuole, while animal cells have numerous small vacuoles.

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The antigenic determinants on the surface of erythrocytes are mainly

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Lysosome is formed from which of the following cell organelles?

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With reference to the evolution of living organisms, which one of the following sequences is correct?

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Which one of the following is true regarding plant cells and animal cells?

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DNA is stored majorly in . . . . . . . . of the cell.

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