Centrioles and centrosomes occur in the cells of
green plants
animals
bacteria and cyanobacteria
both (b) and (c)
Correct Answer :
B. animals
A centriole is a barrel - shaped cell structure found in most animal eukaryotic cells, though absent in higher plants and most fungi.
Related Questions
Which of the following is absent in prokaryotes?
DNA
RNA
Plasma membrane
Mitochondria
Axoneme with 9 + 2 microtubular arrangement occurs in
cilia
flagella
both (a) and (b)
centriole
Which of the following statement of a bacterial cell is/are correct?
- Mesosome is formed by the extensions of plasma membrane into the cell.
- The pili are elongated tubular structures made up of a protein.
- Flagellum is composed of filament, hook and basal body.
- Ribosomes are about 30 nm by 50 nm in size.
(i), (ii), (iii)
All of the above
(ii) & (iv)
None of the above
Which of these is wrongly matched?
Chloroplasts Chlorophyll
Elaioplasts Starch
Chromoplasts Carotenoids
Amyloplasts Carbohydrates
Who proposed the theory that Cells arise only from the pre-existing cells?
Mohl
Virchow
Haeckel
Brown
Lysosomes contain
carbohydrates
hormones
nucleic acids
hydrolases.
Identify the cell organelle given below. Which is an important site of formation of glyeoproteins & glycolipids
Rough endoplasmic reticulum
Smooth endoplasmic reticulum
Golgi body
mitochondria
Which of the following statement is correct regarding vacuole?
It is membrane-bound and contains storage proteins and lipids.
It is membrane-bound and contains water and excretory substances.
It lacks membrane and contains air.
It lacks membrane and contains water and excretory substances.
Prokaryotic and eukaryotic flagella differ in the
type of movement and placement.
location and mode of functioning.
microtubular structure and function.
microtubular organization and type of movement.
The lipid component of the membrane mainly consists of __________.
polysaccharides
phosphoglyceride
monosaccharaides
both (a) and (c)
Chromosomes having equal or almost equal arms are called
metacentric
acrocentric
polycentric
acentric.
Which one of the following pairs is not correctly matched?
Cristae The tubular structure formed by the folding of the inner membrane of the mitochondrion.
Plasmodesmata The membrane surrounding the vacuole in plants.
Grana Membrane bound discs in chloroplasts that contain chlorophylls and carotenoids.
Middle lamella Layer between adjacent cells walls in plants derived from cell plate.
In prokaryotes, chromatophores are
specialized granules responsible for colouration of cells
structures responsible for organizing the shape of the organism.
inclusion bodies lying free inside the cells for carrying out various metabolic activities.
internal membrane system which becomes extensive and complex in photosynthetic bacteria.
Which of the following organelles is directly connected to the outer membrane of the nucleus in a eukaryotic cell?
Mitochondrion
Lysosome
Golgi apparatus
Endoplasmic reticulum
Which one of the following cellular parts is correctly matched with their characters ?
Centrioles Sites for active RNA synthesis.
Lysosomes Optimally active at a pH of about 8.5.
Thylakoids Flattened membranous sacs forming the grana of chloroplasts.
Ribosomes Those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S).
The best way to identify a cell as either prokaryotic or eukaryotic is to determine whether
it came from a single-celled or multicellular organism.
it has a nucleus.
it has a plasma membrane.
it has cytosol.
Select the correct match of the types of neuron present in column I with its location given in column II.
| Column I | Column II |
|---|---|
| A. Centrioles | (i) Non-membrane bound organelle which helps in cell division |
| B. Fimbriae | (ii) Special structure of bacteria which help them to attach with rocks in stream and also to host tissue |
| C. Endomembrane | (iii) Includes those organelles system whose functions are coordinated |
| D. Mitochondria | (iv) Divide by fission and site of aerobic respiration |
A - (i), B - (ii), C - (iii), D - (iv)
A - (iii), B - (i), C - (ii), D - (iv)
A - (iii), B - (i), C - (iv), D - (ii)
A - (i), B - (iv), C - (iii), D - (ii)
The membrane of the erythrocytes has approximately ___% of proteins and ___% lipids.
42, 50
52, 40
50, 50
60, 40
Match column-I and column-II and select the correct answer
| Column-I | Column-II |
|---|---|
| A. Bacteria without walls | I. Lysosome |
| B. Small circular DNA | II. Mycoplasma cells |
| C. Flattened sacs in | III. Thylakoid a chloroplast |
| D. A vesicle in which | IV. Plasmid hydrolytic enzymes are stored |
A III; B IV; C II; D I
A II; B IV; C III; D I
A I; B II; C III; D IV
A IV; B III; C I ; D II
Which of the following statements are incorrect ?
- Plant cells have centrioles which are absent in almost all animal cells.
- Ribosomes are the site of protein synthesis.
- The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together.
- In animal cell, steroidal hormones are synthesized by smooth endoplasmic reticulum. Of the above statements
(i) and (iii)
(iii) and (iv)
(ii) and (iv)
(i) and (iv)
Which of the following pair lack the unit membrane?
Nucleus and E.R.
Mitochondria and chloroplast
Ribosome and nucleolus
Golgi body and lysosome
Plastids storing fat are called
Elaioplasts
Sphaerosomes
Aleuroplasts
Pyrenoids
Integral proteins of cell membrane occur on/in
inner surfaces
outer surfaces
phospholipid matrix
inner and outer surfaces
Centrifugation of a cell results in the rupture of the cell membrane and the contents compacting into a pellets in the bottom of the centrifuge tube. Bathing this pellet with a glucose solution yields metabolic activity including the production of ATP. One of the contents of this pellet is most likely which of the following?
Cytosol
Mitochondria
Lysosomes
Golgi bodies
Which of the following will determines the shape of the cells and provides a strong structural support to prevent the bacterium from bursting or collapsing?
Plasmids
Cell wall
Mesosome
Cell membrane
Which of the following option correctly match A, B, C, and D indicated in the given sectional view of chloroplasts.
A - Thylakoid, B-Stromal lamella, C - Stroma, D - Granum
A - Granum, B - Thylakoid, C - Stromal lamella, D - Stroma
A - Thylakoid, B - Granum, C - Stromal lamella, D - Stroma
A - Granum, B - Thylakoid, C - Stroma, D - Stromal lamella
Grana are
protein storing plastids.
coloured plastids.
stacks of thylakoids.
individual thylakoids present in stroma.
Which one of the following structures between two adjacent cells is an effective transport pathway?
Plasmodesmata
Plastoquinones
Endoplasmic reticulum
Plasmalemma
Match column-I with column-II and select the correct option.
| Column - I | Column - II |
|---|---|
| A. Golgi apparatus | I. Storage |
| B. Mitochondria | II. Photosynthesis |
| C. Vacuoles | III. Transport |
| D. Grana | IV. Secretion |
| .. | V. Respiration |
A - IV, B - V, C - I, D - II
A - I, B - II, C - IV, D - III
A - IV, B - I, C - II, D - III
A - I, B - II, C - III, D - IV
Which of the following is incorrect ?
Mycoplasma is the smallest cell (0.3 �).
Bacteria are 3 to 5 �m in size.
The largest cell is the egg of an ostrich.
Nerve cells are some of the smallest cells.