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NEET Questions / Chemistry / Classification of Elements and Periodicity in Properties / Introduction
Which of the following statements are correct? I. Occurrence of different types of tissues, organs and organ system results in division of labour II. A new cell always develops by the division of a pre-existing cells III. Cells are totipotent IV. Cell is the smallest unit, capable of independent existence and performing the essential functions of life The correct option is
I, II and III
I, III and IV
II, III and IV
I, II, III and IV
Comparing small and large cells, which statement is correct?
Small cells have a small surface area per volume ratio
Exchange rate of nutrients is fast with large cells
Small cells have a large surface area per volume ratio
Exchange rate of nutrients is slow with small cells
Flocculation or coagulation of protoplasm is the
Interchangeability between sol and gel states
Ability to scatter that beam of light
Erratic zig-zag movement of protoplasmic particles
Ability of protoplasm to increase in size when they lose charges
Select the right option which relates to Schwann regarding the following statement I. He reported that cells have a thin outer layer which is today known as plasma membrane II. Cell wall is a unique character of the plant cell III. Body of plants and animals are composed of cells and product of cells Choose the correct option from below
I and II
III Only
II and III
I, II and III
Which of the following statements are false? I. Most cells are tiny and their volume ranges from 1 to 1000 . II. Some cells have the microvilli to increase the absorptive surface area. III. All cells arise from pre-existing cells. IV. In plants, translocation of solutes is performed by xylem vessels and tracheids. V. According to cell theory, all cells arise from abiotic material.
I, III and V are false
I, IV and V are false
II, III and IV are false
III, IV and V are false
Which of the following statements are correct? I. Human RBC is about 7.0 in diameter II. Cytoplasm is the main arena of cellular activities III. The shape of the cells may vary with the function they perform IV. Various chemical reactions occur in cytoplasm to keep the cell in the living state Choose the correct option
I, III and IV
I, IV and II
I, II, III and IV
II, III and IV
Complete the given NCERT statements (I-III) by choosing appropriate options for the blanks (A-D) I. Cells that have membrane bound nuclei are called โฆAโฆ II. In both โฆBโฆ and โฆCโฆ cells, cytoplasm is the main arena of cellular activities III. Cell that lack a membrane bound nucleus are called โฆDโฆ
A-prokaryotic cells, B-plant cells, C-animal cells, D-eukaryotic cells
A-eukaryotic cells, B-animal cells, C-plant cells, D-prokaryotic cells
A-prokaryotic cells, B-plant cells, C-eukaryotic cells, D-animal cells
A-eukaryotic cells, B-plant cells, C-prokaryotic cells, D-animal cells
Which of the following statements are correct? I. Nerve cells are the smallest of all cells II. Bacteria are 3-5 in length III. The largest cell is the egg of an ostrich IV. Mycoplasma is the smallest cell (0.3 in length) Choose the correct option
I, II, III and IV
Only II
Only I
II, III and IV
Which of the following pairs lack the unit membrane?
Nucleus and ER
Mitochondria and chloroplast
Ribosome and nucleolus
Golgi body and lysosome
Which of the following statements are correct? I. Mycoplasmas are the smallest cells II. Nerve cells are some of the longest cells III. Ribosomes are non-membrane bound organelles found only in eukaryotic cells IV. The cytoplasm is the main arena of cellular activities only in plant cells
I, II and III
I and II
II and III
I, II, III and IV
