Free NEET Biology multiple-choice questions on Algae. Attempt each question and reveal the answer with a full explanation.
Which of the following pigments is responsible for the characteristic brown color of Phaeophyceae (Brown Algae)? Fucoxanthin Chlorophyll b Phycoerythrin Anthocyanin Which of the following algae produce Carrageen? Brown algae Red algae Blue-green algae Green algae Which of the following algae contains mannitol as reserve food material? Gracilaria Volvox Ulothrix Ectocarpus Hydrocolloid carrageen is obtained from: Phaeophyceae and Rhodophyceae Rhodophyceae only Phaeophyceae only Chlorophyceae and Phaeophyceae Which of the following is incorrectly matched? Ulothrix – Mannitol Porphyra – Floridian Starch Volvox – Starch Ectocarpus – Fucoxanthin Isogamous reproduction with non-flagellated (non-motile) gametes is found in: Spirogyra Volvox Fucus Chlamydomonas In the life cycle of Polysiphonia (Red Algae), the pattern is: Haplo-diplontic Haplontic Diplontic Diplohaplontic In which of the following algae is sexual reproduction isogamous with flagellated gametes? Ulothrix Spirogyra Volvox Fucus In Chlorophyceae (Green Algae), the flagellation pattern is typically characterized by: 2-8, equal, apical 2, unequal, lateral Flagella are absent Many, equal, all over the body Which of the following is used in the preparation of 'Agar', a gelatinous substance used to grow microbes and in ice creams? Gelidium and Gracilaria Chlorella and Spirulina Laminaria and Sargassum Dictyota and Ectocarpus Bioluminescence is well-marked in members of which phylum? Ctenophora Cnidaria Porifera Platyhelminthes Which class of algae is commonly known as 'Red Algae' due to the dominance of the pigment r-phycoerythrin? Rhodophyceae Chlorophyceae Phaeophyceae Cyanophyceae The cell walls of diatoms are embedded with , making them indestructible. Silica Chitin Cellulose Calcium carbonate In Phylum Cnidaria, the specialized cells used for anchorage, defense, and capture of prey are called: Cnidoblasts Choanocytes Colloblasts Solenocytes Which of the following phylum is characterized by the presence of comb plates for locomotion? Ctenophora Cnidaria Porifera Mollusca The reproduction in Spirogyra involving the fusion of two similar-sized motile or non-motile gametes is called: Isogamous Anisogamous Oogamous Metagenic Which of the following algae is used as food by space travellers due to its high protein content? Chlorella Spirogyra Gelidium Volvox In Ctenophora, locomotion is achieved by how many external rows of ciliated comb plates? Eight Six Four Ten Parenchyma cells containing large air cavities that provide buoyancy to aquatic plants are known as: Aerenchyma Chlorenchyma Prosenchyma Idioblasts In aquatic plants like Pistia and Eichhornia, the root tip is protected by: Root pockets Root caps Coleorhiza Calyptra In grasses, certain adaxial epidermal cells along the veins modify themselves into large, empty, colourless cells. These are called: Bulliform cells Subsidiary cells Lenticels Complementary cells In an isobilateral leaf (monocot leaf), the stomata are present: On both the surfaces of the epidermis Only on the abaxial surface Only on the adaxial surface Only on the leaf margins If you are asked to classify the various algae into distinct groups, which of the following characters you should choose? nature of stored food materials in the cell structural organization of thallus chemical composition of the cell wall types of pigments present in the cell. Algal cell walls are made of Cellulose, galactans and mannans Hemicellulose, pectin and proteins Peptidoglycan and lipopolysaccharides Cellulose, hemicellulose and pectin Select the wrong statement: Isogametes are similar in structure, function and behaviour Anisogametes differ either in structure, function or behaviour In Oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile Chlamydomonas Exhibits both isogamy and anisogamy and Fucus shows oogamy Monoecious plant of Chara shows occurrence of Antheridiophore and archegoniophore on the same plant Stamen and carpel on the same plant Upper antheridium and lower oogonium on the same plant Upper oogonium and lower antheridium on the same plant Read the following statements and choose the set of correct statements: In the members of Phaeophyceae, A. Asexual reproduction occurs usually by biflagellate zoospores. B. Sexual reproduction is by oogamous method only. C. Stored food is in the form of carbohydrates which is either mannitol or laminarin. D. The major pigments found are chlorophyll a, c and carotenoids and xanthophyll. E. Vegetative cells have a cellulosic wall, usually covered on the outside by gelatinous coating of algin. Choose the correct answer from the options given below: (1) A, B, C and D only (2) B, C, D and E only (3) A, C, D and E only (4) A, B, C and E only Mannitol is the stored food in - Gracillaria Chara Porphyra Fucus Isogamous condition with non-flagellated gametes is found in Chlamydomonas Spirogyra Volvox Fucus Which one of the following shows isogamy with non-flagellated gametes? Sargassum Ectocarpus Ulothrix Spirogyra Which one of the following is wrong about Chara? Upper oogonium and lower round antheridium. Globule and nucule present on the same plant. Upper antheridium and lower oogonium Globule is male reproductive structure Which of the following pairs is of unicellular algae? (1) Gelidium and Gracilaria (2) Anabaena and Volvox (3) Chlorella and Spirulina (4) Laminaria and Sargassum Floridean starch has structure similar to Amylopectin and glycogen Mannitol and algin Laminarin and cellulose Starch and cellulose