A, B and C
A and B
A
A and C
C. A
50S and 30S subunits unite to form 70S ribosomes.
Polysome/polyribosome consists of many ribosomes only.
Ribosome is the site of protein synthesis.
Polysome indicate the synthesis of identical poolypeptide in multiple copies.
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.
RBC of human
RBC of frog
cheek cell of human
liver cell of rat
W
X
Y
Z
The ribosomes of a polysome translate the mRNA into protein.
Mitochondria divide by fragmentation.
All cell arise from pre-existing cells.
The lipid component of the membrane mainly consists of phosphoglycerides.
Part (D): Outer membrane Gives rise to inner membrane by splitting.
Part (B): Inner membrane Forms infoldings called cristae.
Part (C): Cristae Possess single circular DNA molecule and ribosomes.
Part (A): Matrix Major site for respiratory chain enzymes.
Column-I | Column-II |
---|---|
A. Mitochondria | I. Without membrane |
B. Lysosomes | II. Single membrane |
C. Ribosomes | III. Double membrane |
A - I, B - II, C - III
A - III, B - I, C - II
A - III, B - II, C - I
A - II, B - III, C - I
Active transport
Facilitated diffusion
Simple diffusion
Na+ K+ pump
Mitochondrion
Lysosome
Golgi apparatus
Endoplasmic reticulum
structurally different but functionally similar.
structurally as well as functionally different.
structurally similar but functionally different.
structurally different but functionally similar.
(i), (ii), (iii)
All of the above
(ii) & (iv)
None of the above
Gametes
Amoeba
Mycoplasma
All of these
on ribosomes present in cytoplasm as well as in mitochondria.
on ribosomes present in the nucleolus as well as in cytoplasm.
only on ribosomes attached to the nuclears envelope and endoplasmic reticulum.
only on the ribosomes present in cytosol.
(I) and (III) only
(II), (III) and (IV) only
(III) and (IV) only
(II) and (IV) only
protein storing plastids.
coloured plastids.
stacks of thylakoids.
individual thylakoids present in stroma.
cell wall
nuclear membrane
ribosome
none of these
Bacteria
Protists
Fungi
Plants
(iii) and (iv)
(i) and (ii)
(ii) and (iii)
(i) and (iv)
A - Outer membrane, B - Inner membrane, C - Matrix, D - Inter- membrane space, E - Crista
A - Outer membrane, B - Inner membrane, C - Intermembrane space, D - Matrix, E - Crista
A - Outer membrane, B - Inner membrane, C - Matrix, D - Crista, E - Inter - membrane space
A - Outer membrane, B - Inner membrane, C- Crista, D - Matrix, E - Inter-membrane space
Golgi complex
Peroxisome
Vacuole
Lysosome
Na+/K+ pump is an example of active transport.
In plant cells lipid like steroidal hormones are synthesized in SER.
In plant cells, the vacuoles can occupy up to 10% of the volume of the cell.
Chlorophyll and leucoplast are responsible for trapping light energy essential for photosynthesis.
mitochondria
centriole
flagella
spindle fibres
Sample A | Sample B |
---|---|
Make energy available for cellular metabolism | Generates ATP and synthes izes s ugar |
Absent in cell that carry oxygen throughout the body | Present in plant cell |
Called the energy currency of cell | Source o f all the food energy |
Sample A - Mitochondria, Sample B - Chloroplast; because both the organelles are double membrane bound structure.
Sample A- Mitochondria, Sample B - Chloroplast; because they both are capable of synthesis of their own proteins only.
Sample A - Mitochondria, Sample B - Chloroplast; because they are capable of synthesis of their own proteins and contain their own DNA.
Sample A- Mitochondria, Sample B - Chloroplast; because they contain their own DNA to transfer the genetic information from one generation to another.
increasing the number of phospholipids with unsaturated hydrocarbon tails.
increasing the proportion of integral proteins.
increasing concentration of cholesterol in membrane.
increasing the number of phospholipids with saturated hydrocarbon tail.
vacuole
ribosome
peroxisome
lysosome
autolysis
protein synthesis
lipid synthesis
carbohydrate synthesis
neutral and isotonic.
alkaline and isotonic.
acidic and hypertonic.
equal to cytoplasm and isotonic.
Proteins in cell membranes can travel within the lipid bilayer.
Proteins can also undergo flip-flop movements in the lipid bilayer.
Proteins can remain confined within certain domains of the membrane.
Many proteins remain completely embedded within the lipid bilayer.
higher plants
yeast
bacteria and blue-green algae
None of the above
Primary cell wall
Secondary cell wall
Middle lamella
Tertiary cell wall