15721.The spherical structured organelle that contains the genetic material is
Cell walls
Ribosomes
Nucleus
Mitochondria
15722.Which of the following statements are true about Endoplasmic Reticulum?
(a) Smooth Endoplasmic Reticulum makes lipids.
(b) It is also called the control center of the cell.
(c) It processes carbohydrates.
(d) It modifies chemicals that are toxic to the cell.
(a) Smooth Endoplasmic Reticulum makes lipids.
(b) It is also called the control center of the cell.
(c) It processes carbohydrates.
(d) It modifies chemicals that are toxic to the cell.
(a), (b) and (c)
(a), (c) and (d)
only (a) and (d)
all are correct
15723.Which one of the following organisms is not an example of eukaryotic cells
Amoeba proteus
Paramecium caudatum
Escherichia coli
Euglena viridis
15724.Which one of the following organelles digests the old organelles that are no longer useful to the cells?
Ribosomes
Mitochondria
Lysosomes
Chromatin
15725.Cell sap is a
Living content of the cell
Non living content of the vacuole
Non-living content of the protoplasm
Living content of the cytoplasm
15726.Purines possess nitrogen at
1, 2, 4 and 6 position
1, 3, 5 and 7 position
1, 3, 7 and 9 position
1, 2, 6 and 8 position
15728.Which of the following is an example of cell devoid of nuclear membrane and mitochondria is
Bacterial cell
Sperm
Protist
Sponge cell
15729.Which one of the following is not considered as a part of the endomembrane system?
Vacuole
Lysosome
Golgi complex
Peroxisome
15730.Carbohydrates present in the plasmalemma are in the form of
cellulose
hemicellulose
starch
glycolipids and glycoproteins
15732.Cellular totipotency means
Synthesis of new cells
Formation of new plants
Formation of new species
Capability of a plant cell to form complete plant
15733.Compare the statements A and B.
Statement A : Sclerenchyma cells do not have plasmodesmata.
Statement B : The cell walls of some permanent tissues are heavily lignified.
Select the correct description.
Statement A : Sclerenchyma cells do not have plasmodesmata.
Statement B : The cell walls of some permanent tissues are heavily lignified.
Select the correct description.
Both the statements A and B are wrong.
Statement A is correct and B is wrong.
Statement A is wrong and B is correct.
Both the statements A and B are correct.
15734.The cytoplasmic connections from cell to cell are known as
middle lamella
plasmodesmata
cell membrane system
endoplasmic reticulum
15735.Important site for formation of glycoproteins and glycolipids is
Lysosome
Vacuole
Golgi apparatus
Plastid
15736.The suffix S in ribosome unit indicates
Solubility
Sedimentation coefficient
Surface Area
Size
15737.In a Golgi complex the structure which is the functional unit is
Cisternae
Thylakoid
Archoplasm
Cristae
15739.The main arena of various types of activities of a cell is
Nucleus
Plasma membrane
Mitochondria
Cytoplasm