Check your Grasp from S DINESH & CO BIOLOGY (HINGLISH) Chapter 31:STRUCTURE OF THE CELL for Class 12
| Class 12 | BIOLOGY |
| Chapter | STRUCTURE OF THE CELL |
| S DINESH & CO BIOLOGY (HINGLISH) | Check your Grasp |
| Medium | English |
| Academic Year | 2023-2024 |
Question 523
Which is correct option amongst the following statements ?
a. Nuclear membrane, chloroplasts, mitochondria, microtubules and pili are absent in prokaryotic cells
b. Nuclear membrane, chloroplasts, mitochondria, microtubules and pili are present in eukaryotic cells
c. Ribosomes are 70S in prokaryotic cells, chloroplasts and mitochondria. They are 80S in animal cells. View SolutionQuestion 551
These questions consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following five responses.
Assertion: Eukaryotic cells have the ability to adopt a variety of shapes and carry out direted movements.
Reason: There are three principal types of protein filaments−microfilaments, microtubules and and intermediate filaments, which constitute the cytoskeleton.View SolutionQuestion 642
Consider the following statements
(A) Plant cells have centrioles which are absent in almost all animal cells
(B) Ribosomes are the site of protein synthesis
(C ) The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together
(D) In animal cell steroidal hormones are synthesized by smooth endoplasmicreticulum
Of the above statementsView SolutionQuestion 647
Identify the components labelled A, B, C and D in the diagram below from the list (i) to (vii) given along with
Components :
(i) Cristae of mitochondria
(ii) Inner membrane of mitochondria
(iii) Cytoplasm
(iv) Smooth endoplasmic reticulum
(v) Rough endoplasmic
(vi) Mitochondrial matrix
(vii) Cell vacuole
(viii) Nucleus
The correct components are
View SolutionQuestion 670
Consider the following statements and select the correct option
A. The endomembrane system includes plasma membrane, ER, Golgi complex, lysosomes and vacuoles
B. ER helps in the transport of substances, synthesis of proteins, lipoproteins and glycogen
C. Ribosomes are involed in protein synthesis
D. Mitochondria help in oxidative phosphorylation and generation of ATPView SolutionQuestion 702
Choose the wrong statement regarding bacterial cell
A. Glycocalyx is the outer most envlope in bacteria
B. The glycocalyx could be a loose sheath called capsule
C. The glycocalyx may be thick and tough called slime layer
D. A special structure formed by the plasma membrane is called mesosome
E. Small bristle like fibers sprouting out of the cell are called fimbriaeView SolutionQuestion 703
Consider the following statements
A. In prokaryotic cells a special membranous structure formed by the extension of the plasma membrane into the cell is known as polysome
B. The smooth endoplasmic reticulum is the major site for synthesis of glycoproteins
C. RuBisCo is the most abundant protein in the whole of biospshere
D. Mitochondria, chloroplasts and peroxisomes are not considered as part of endomembrane system
Of the above statementsView SolutionQuestion 714
Consider the following statement
(a) Endomembrane system includes mitochondria , chloroplast and peroxisomes
(b) Smooth endoplasmic reticulum is major site for synthesis of lipid
(c) Rough endoplamic reticulum is actually involved in protein synthesis
(d) Mitchondrial matrix possesses single cirular DNA , a few RNAs and 80 S ribosomes
Of the above statements View SolutionQuestion 716
I. It is a membrane bound space found in cytoplasm
II. It is bound by a single membrane called tonoplast.
III. It contains watery sap, excretory products and other materials not useful to cell.
IV. It has higher concentration of sap than the cytoplasm.
The above statements apply toView Solution
