Question

important questions on fundamental unit of life

Answer 1

cell is the fundamental unit

Answer 2

Which of the following can be made into crystal?(a) A Bacterium(b) An Amoeba(c) A Virus(d) A SpermA cell will swell up if(a) The concentration of water molecules in the cell is higher than the concentration of water molecules in surrounding medium(b) The concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell(c) The concentration of water molecules is same in the cell and in the surrounding medium(d) Concentration of water molecules does not matterChromosomes are made up of(a) DNA(b) protein(c) DNA and protein(d) RNAWhich of these options are not a function of Ribosomes?
(i) It helps in manufacture of protein molecules
(ii) It helps in manufacture of enzymes
(iii) It helps in manufacture of hormones
(iv) It helps in manufacture of starch molecules(a) (i) and (ii)(b) (ii) and (iii)(c) (iii) and (iv)(d) (iv) and (i)Which of these is not related to endoplasmic reticulum?(a) It behaves as transport channel for proteins between nucleus and cytoplasm(b) It transports materials between various regions in cytoplasm(c) It can be the site of energy generation(d) It can be the site for some biochemical activities of the cellFollowing are a few definitions of osmosis Read carefully and select the correct definition(a) Movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane(b) Movement of solvent molecules from its higher concentration to lower concentration(c) Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane(d) Movement of solute molecules from lower concentration to higher concentration of solution through a semipermeable membranePlasmolysis in a plant cell is defined as(a) break down (lysis ) of plasma membrane in hypotonic medium(b) shrinkage of cytoplasm in hypertonic medium(c) shrinkage of nucleoplasm(d) none of themWhich of the following are covered by a single membrane?(a) Mitochondria(b) Vacuole(c) Lysosome(d) PlastidFind out the false sentences(a) Golgi apparatus is involved with the formation of lysosomes(b) Nucleus, mitochondria and plastid have DNA; hence they are able to make their own structural proteins(c) Mitochondria is said to be the power house of the cell as ATP is generated in them.(d) Cytoplasm is called as protoplasmFind out the correct sentence(a) Enzymes packed in Lysosomes are made through RER (rough endoplasmic reticulum)(b) Rough endoplasmic reticulum and smooth endoplasmic reticulum produce lipid and protein respectively(c) Endoplasmic reticulum is related with the destruction of plasma membrane(d) Nucleoid is present inside the nucleoplasm of eukaryotic nucleusWhich cell organelle plays a crucial role in detoxifying many poisons and drugs in a cell?(a) Golgi apparatus(b) Lysosomes(c) Smooth endoplasmic reticulum(d) VacuolesThe proteins and lipids, essential for building the cell membrane, are manufactured by(a) rough endoplasmic reticulum(b) golgi apparatus(c) plasma membrane(d) mitochondriaThe undefined nuclear region of prokaryotes are also known as(a) nucleus(b) nucleolus(c) nucleic acid(d) nucleoidThe cell organelle involved in forming complex sugars from simple sugars are(a) endoplasmic reticulum(b) ribosomes(c) plastids(d) golgi apparatusWhich out of the following is not a function of vacuole?(a) Storage(b) Providing turgidity and rigidity to the cell(c) Waste excretion(d) LocomotionAmoeba acquires its food through a process, termed(a) exocytosis(b) endocytosis(c) plasmolysis(d) exocytosis and endocytosis bothCell wall of which one of these is not made up of cellulose?(a) Bacteria(b) Hydrilla(c) Mango tree(d) CactusSilver nitrate solution is used to study(a) endoplasmic reticulum(b) golgi apparatus(c) nucleus(d) mitochondriaOrganelle other than nucleus, containing DNA is(a) endoplasmic reticulum(b) golgi apparatus(c) mitochondria(d) lysosomeKitchen of the cell is(a) mitochondria(b) endoplasmic reticulum(c) chloroplast(d) golgi apparatusLipid molecules in the cell are sythesized by(a) smooth endoplasmic reticulum(b) rough endoplasmic reticulum(c) golgi apparatus(d) plastidsCell arises from pre-existing cell was stated by(a) Haeckel(b) Virchow(c) Hooke(d) SchleidenCell theory was given by(a) Schleiden and Schwann(b) Virchow(c) Hooke(d) HaeckelThe only cell organelle seen in prokaryotic cell is(a) mitochondria(b) ribosomes(c) plastids(d) lysosomesOrganelle without a cell membrane is(a) ribosome(b) golgi apparatus(c) chloroplast(d) nucleus1 μm is(a) 10–6 m(b) 10–9 m(c) 10–10 m(d) 10–3 m