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551.

Do bigger organisms have larger cells?

Answer»

It is not necessary that the size of cells in large organisms will be large and the cells in small organisms will be smaller.

552.

Choose the incorrect matchA. Nucleus-RNAB. Lysosome- Protein synthesisC. Mitochondria- RespirationD. Cytoskeleton- Microtubules

Answer» Correct Answer - B
553.

Name the cell organell that is known as “suicidal bags of the cell”.

Answer»

Lysosomes is the cell organell that is known as “suicidal bags of the cell”.

554.

Write the main function of Smooth Endoplasmic Reticulum.

Answer»

The SER helps in the manufacture of fat molecules or lipids important for cell function.

555.

What happens if Endoplasmic reticulum is destroyed in the cell?

Answer»

The transportation of substances from one part to another part of the cell will not occur.

556.

Cell organelle can be separated byA. X-ray diffractionB. autoradiographyC. thin-section microtomyD. differential centrifugation

Answer» Correct Answer - D
557.

During ultracentrifugation of cell homogenate, which fraction would be separated at `10000gxx20` minutes?A. Mitochondria and lysosomesB. ribosomes and microsomeC. nucleus and mitochondriaD. endoplasmic reticulum

Answer» Correct Answer - A
At 400-500`xxg` speed it yields a pellet consisting of unbroken tissue, whole cells, cell nuclei and large debris. 10000-20000`xxg` brings mitochondria, lyososomes and peroxisomes. 80000`xxg` yields microsomal pellet, while at 150000-300000`xxg` ribosomes and macromolecules sediment.
558.

The use of oil immersion canA. increase the value of refractive indexB. decrease the value of refractive indexC. increase the value of numerical apertureD. decrease the value of numerical aperture

Answer» Correct Answer - C
Oil immersion is a technique used to increase the resolution of a microscope by immersing objective lens and the speciemen in a transparent oil of high refractive index, thus increasing numerical aperture, e.g. cedar wood oil.
559.

Which of the following organelles possess oxidases and are associated with oxidation reaction other than those oF respiration?A. SpherosomesB. PeroxisomesC. LysosomesD. Golgi

Answer» Correct Answer - B
560.

The correct sequence of cell organelles during photores piration isA. Chloroplast-Rough endoplasmic reticulum-Dic- tyosomesB. Chloroplast-Mitochondria-PeroxisomeC. Chloroplast-Vacuole-PeroxisomeD. Chloroplast-Golgi bodies-Mitochondria

Answer» Correct Answer - B
561.

Who coined the term ’Cytoblast’ and why?

Answer»

Schleiden called the nucleus as cytoblast, because he thought that new cells were created from the nucleus.

562.

The cell organelle involved in cellular respiration is _____A. mitochondriaB. nucleusC. chloroplastD. ribosome

Answer» Correct Answer - A
563.

The term plasmalemma was coined byA. NegaliB. C cramerC. PlowerD. Clowes

Answer» Correct Answer - C
564.

What is the function of a nucleus in a cell?

Answer»

The nucleus plays a vital role in the cell.

It controls all functions of the cell. It controls cell division. 

Nucleus contains chromosomes. These chromosomes contain DNA and proteins.

565.

What is the role of the cell wall in plant cells?

Answer»

It exerts an inward wall pressure to resist the outward pressure exerted by the cell sap.

566.

Choose the correct statement.A. Peripheral fibril of centriole is doubletB. Axoneme is not covered by plasma membraneC. Kinetochores are found on secondary constriction alsoD. fungi possess unicisternal golgi

Answer» Correct Answer - D
567.

Schleiden and Schwann proposed cell theory inA. 1836`-`37B. 1838`-`39C. 1901`-`02D. 1938`-`39

Answer» Correct Answer - B
Schleiden and Schwann proposed cell theory 1838-39.
568.

What is main iste of rRNA syntheiss ?

Answer» Correct Answer - Nucleolus.
569.

rRNA is synthesised inA. E.RB. NucleusC. NucleolusD. Cytoplasm

Answer» Correct Answer - C
rRNA is synthesised in nucleolus.
570.

Spherosomes haveA. Cellulose reserveB. Protein reserveC. Lipid reserveD. Both protein and lipid reserve

Answer» Correct Answer - C
Sphaherosomes have lipid reserve.
571.

These are the traps of solar energy. A) Lysosomes B) Ribosomes C) Chloropiasts D) Nucleus

Answer»

Correct option is C) Chloropiasts

572.

Storage sacs of the cell A) Lysosomes B) Ribosomes C) Vacuole D) Nucleolus

Answer»

Correct option is C) Vacuole

573.

Choose the correct matching from the following :List – AList – B1) Suicidal bagsa) Cheek cell2) Mitochondriab) Onion peel cell3) Nucleusc) LysosomesA) 1 – b, 2 – c, 3 – a B) 1 – c, 2 – a, 3 – b C) 1 – a, 2 – b, 3 – c D) 1 – c, 2 – b, 3 – a

Answer»

D) 1 – c, 2 – b, 3 – a

574.

Match the following :Group – AGroup – B1) NucleusA) Cell’s power house2) ProkaryotesB) Suicide bags3) LysosomesC) Protein synthesis4) MitochondriaD) Regulate and controls all the functions of a cell.5) Rough endoplasmic reticulumE) BacteriumF) Lipid synthesis

Answer»
Group – AGroup – B
1) NucleusD) Regulate and controls all the functions of a cell.
2) ProkaryotesE) Bacterium
3) LysosomesB) Suicide bags
4) MitochondriaA) Cell’s power house
5) Rough endoplasmic reticulumC) Protein synthesis
575.

Match the following :Group – AGroup – B1) MitochondriaA) Cyto skeleton2) LysosomesB) Secrection3) NucleusC) Cell’s power house4) ERD) Cell’s control room5) Golgi complexE) Suicidal bags

Answer»
Group – AGroup – B
1) MitochondriaC) Cell’s power house
2) LysosomesE) Suicidal bags
3) NucleusD) Cell’s control room
4) ERB) Secrection
5) Golgi complexA) Cyto skeleton
576.

The Red blood cells have less life span because A) presence of haemoglobin B) presence of nucleus C) absence of nucleus D) presence of nucleolus

Answer»

C) absence of nucleus

577.

Match the following :Group – AGroup – B1) Semi permeableA) Chloroplast2) Traps solar energyB) Prokaryote3) CynobacteriaC) Cell wall4) DetoxificationD) Plasma membrane5) Withstand greater changes in surroundingsE) SER

Answer»
Group – AGroup – B
1) Semi permeableD) Plasma membrane
2) Traps solar energyA) Chloroplast
3) CynobacteriaB) Prokaryote
4) DetoxificationE) SER
5) Withstand greater changes in surroundingsC) Cell wall
578.

Choose the correct answer from the following matching.List – AList – B1) Prokaryotea) Lipid synthesis2) Ribosomesb) Protein factories3) Smooth ERc) BacteriumA) 1 – a, 2 – b, 3 – c B) 1 – b, 2 – c, 3 – a C) 1 – c, 2 – a, 3 – b D) 1 – c, 2 – b, 3 – a

Answer»

D) 1 – c, 2 – b, 3 – a

The correct option is  (D)

579.

What are Thylakoids ?

Answer»

Membrane bound flattened sacs of granum are called hylakoids.

580.

Expand ATP. 

Answer»

Adenosine Triphosphate.

581.

Expand RER. 

Answer»

Rough endoplasmic reticulum.

582.

What is the composition of cell wall in plants?

Answer»

Cell wall is made of cellulose, hemicellulose, pectins and proteins in plants. 

583.

What does fluid mosaic model state?

Answer»

According to fluid mosaic model, the quasifluid nature of lipid enables lateral movement of proteins within the overall bilayer.

584.

What is passive transport?

Answer»

Movement of molecules across the plasma membrane without any requirement of energy is called passive transport. 

585.

What is active transport?

Answer»

A few ions or molecules are transported across the plasma membrane against their concentration gradient with the utilisation of ATP (energy). This transportation is called as active transport.

586.

Ribosomes are so called because of highA. ribose contentB. RNA contentC. both (a) and (b)D. None of these

Answer» Correct Answer - B
587.

Nucleolus is the site of formation ofA. spindle fibresB. chromosomesC. ribosomesD. peroxisomes

Answer» Correct Answer - C
588.

Which of the following is true for nucleolus ?A. Larger nucleoli are present in dividing cellsB. It is a membrane-bound structureC. It takes part in spindle formationD. It is a site for active ribosomal RNA synthesis

Answer» Correct Answer - D
589.

Nucleolus is formed from specific sites on chromosomes known as….A. nucleolar reorganising regionB. nucleus forming regionC. nucleolar organiser regionD. none of these

Answer» Correct Answer - C
590.

Write the unique feature seen in plant cells.

Answer»

Presence of cell wall is the unique feature seen in plant cells.

591.

Name the selectively permeable membrane that covers the cell.

Answer»

Plasma membrane is the selectively permeable membrane that covers the cell.

592.

Nucleic acid occurs inA. Golgi bodyB. LysosomesC. CytoplasmD. Mitochondria and chloroplasts

Answer» Correct Answer - D
593.

The colourless plastids are A) Chloropiasts B) Chromoplasts C) Leucoplasts D) None

Answer»

Correct option is C) Leucoplasts

594.

Which of the following organelles involved in secretion ? A) nucleus B) mitochondria C) golgi complex D) plastid

Answer»

C) golgi complex

595.

Cell membrane is made up of mainly A) lipids and fats B) lipids and proteins C) proteins and fats D) lipids, fats and proteins

Answer»

B) lipids and proteins

596.

Nuclear membrane is absent in …………. type of cells. A) Eukaryote B) ProkaryoteC) Protista D) Fungi

Answer»

Correct option is B) Prokaryote

597.

Entry of water into rot hairs is an example ofA. diffusionB. imbibitionC. osmosisD. plasmolysis

Answer» Correct Answer - C
598.

Non-stainable region of a chromosome is known asA. centromereB. Primary constrictionC. Both (a) and (b)D. secondary constriction

Answer» Correct Answer - C
599.

Lysosomes are found fromA. Endoplasmic reticulumB. MitochondriaC. Golgi bodiesD. Both a and c

Answer» Correct Answer - C
600.

A semipermeable membrane allows the diffusion ofA. Solute moleculesB. solvent moleculesC. solute and solvent moleculesD. none of these

Answer» Correct Answer - B