NEET Botany Cell The Unit Of Life Class 11 Questions
49 questions
.......... was a German scientist, who observed that all plant tissues are made up of cells. At the same time .......... British scientist studied different type of animal cells.
An improved model of the structure of cell membrane was proposed by Singer and Nicolson in _____ widely accepted as _____?
Na⁺/K⁺ pump is an example of:
Select the organelle which is not included in the endomembrane system.
In 1953, George Palade had observed presence of dense particles in the cytoplasm of animal cell. These particles are
From the statements given below choose the correct option : A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S. B. Each ribosome has two sub-units. C. The two sub-units of 80S ribosome are 60S and 40S while that of 70S are 50S and 30S. D. The two sub-units of 80S ribosome are 60S and 20S and that of 70S are 50S and 20S. E. The two sub-units of 80S are 60S and 30S and that of 70S are 50S and 30S.
Match List - I with List - II.
A specialised membranous structure in a prokaryotic cell which helps in cell wall formation, DNA replication and respiration is:
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The primary function of the Golgi apparatus is to package the materials made by the endoplasmic reticulum and deliver it to intracellular targets and outside the cell. Reason (R): Vesicles containing materials made by the endoplasmic reticulum fuse with the cis face of the Golgi apparatus, and they are modified and released from the trans face of the Golgi apparatus. In the light of the above statements, choose the correct answer from the options given below:
Match List I with List II
The DNA present in chloroplast is:
Match List I with List II :
Given below are two statements: Statement I: Mitochondria and chloroplasts are both double membrane bound organelles. Statement II: Inner membrane of mitochondria is relatively less permeable, as compared to chloroplast. In the light of the above statements, choose the most appropriate answer from the options given below:
Movement and accumulation of ions across a membrane against their concentration gradient can be explained by
Which of the following are NOT considered as the part of endomembrane system? A. Mitochondria B. Endoplasmic Reticulum C. Chloroplasts D. Golgi complex E. Peroxisomes Choose the most appropriate answer from the options given below:
Which of the following functions is carried out by cytoskeleton in a cell?
Which of the following statements with respect to Endoplasmic Reticulum is incorrect?
Which of the following is an incorrect statement?
Match List - I with List - II.
The organelles that are included in the endomembrane system are :
Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?
Which of the following statements about inclusion bodies is incorrect?
The concept of “Omnis cellula-e-cellula” regarding cell division was first proposed by:
Which of the following statements regarding mitochondria is INCORRECT?
Which of the following pair of organelles does NOT contain DNA?
Which of the following statements is NOT CORRECT?
Select the INCORRECT match.
Which of the following events does NOT occur in rough endoplasmic reticulum?
The Golgi complex participates in
Which of the following is TRUE for nucleolus?
Which of the following components provides sticky character to the bacterial cell?
Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?
Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?
A complex of ribosomes attached to a single strand of RNA is known as
Microtubules are the constituents of
Mitochondria and chloroplast are i. semi-autonomous organelles ii. formed by division of pre-existing organelles and they contain DNA but lack protein synthesizing machinery. Which one of the following options is correct?
Select the CORRECT match in the following pairs.
Which one of the following is NOT an inclusion body found in prokaryotes?
Nuclear envelope is a derivative of
The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are
DNA is NOT present in
The motile bacteria are able to move by
Match the following and select the correct answer: i. Centriole ii. Chlorophyll iii. Cristae iv. Ribozymes
The osmotic expansion of a cell kept in water is chiefly regulated by
Which one of the following living organisms completely lacks a cell wall?
Which structures perform the function of mitochondria in bacteria?
The solid linear cytoskeletal elements having a diameter of 6 nₘ and made up of a single type of monomer are known as:
Select the alternative giving correct identification and function of the organelle ‘i’ in the diagram.
The term 'glycocalyx' is used for: