Epiphytes
1. The presence of epiphytic roots is the characteristic feature of_________.
(a) Cuscuta, in which haustoria is present
(b) Pinus, in which mycorrhizal association is present
(c) Orchids, in which velamen tissue is present
(d) Jussiaea, in which floating roots are present
Answer: (c)
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2. Velamen is a special layer of absorptive tissue, consisting of 4 or 5 layers of long polygonal cells, which are formed by the _________.
(a) Stem
(b) Absorbing roots
(c) Hanging roots
(d) Clinging roots
Answer: (c)
3. A plant with epidermis specialised to absorb moisture from the air is______.
(a) Rhizophora
(b) Jussiaea
(c) Vanda
(d) Avicennia
Answer: (c)
4. What is the outer covering of the epiphytic root called?
(a) Velamen
(b) Rhizophore
(c) Semaphore
(d) Pneumatophore
Answer: (a)
5. A root cap is not found in the root of
(a) Stilt root of Pandanus
(b) Seminal roots
(c) Hanging prop root of Banyan
(d) Epiphytic roots
Answer: (d)
6. This is a function of velamen
(a) transpiration
(b) exchange of gases
(c) absorption of moisture from air
(d) absorption of water from soil
Answer: (c)
7. Epiphyllous roots in Begonia and Bryophyllum are
(a) Modified leaves
(b) Green roots
(c) Roots arising from leaves
(d) Roots bearing stem
Answer: (c)
8. Aerial absorptive roots occur in
(a) Mesophytes
(b) Epiphytes
(c) Xerophytes
(d) Hydrophytes
Answer: (b)
9. This root modification does not store food
(a) Napiform
(b) Tuberous
(c) Stilt
(d) Conical
Answer: (c)
10. Identify the correct statement
(a) Velamen roots attach to the soil
(b) In Cuscuta, velamen roots are present
(c) Velamen roots are tap roots
(d) Velamen roots are living
Answer: (d)
Lac Operon
1. Lac operon is an example of
(a) only positive regulation
(b) only negative regulation
(c) both positive and negative regulation
(d) sometimes positive sometimes negative
Answer: (c)
2. In the presence of lactose, how long does it take for the lac operon to be expressed?
(a) when lactose equals glucose concentration
(b) when glucose is more than lactose concentration
(c) as long as lactose is more than glucose concentration
(d) as long as lactose is more than galactose concentration
Answer: (c)
3. Which of these acts as an inducer of the lac operon?
(a) Allolactose
(b) Lactose
(c) Galactose
(d) Glucose
Answer: (a)
4. The sequence of the structural genes in the lac operon is
(a) lacA-lacZ-lacY
(b) lacZ-lacY-lacA
(c) lacZ-lacA-lacY
(d) lacA-lacY-lacZ
Answer: (b)
5. Regulation of the lac operon can be envisioned as regulation of enzyme synthesis by its
(a) lactose
(b) substrate
(c) carbohydrates
(d) all of the above
Answer: (d)
6. Lac Operon will be turned on when
(a) Lactose is less than glucose
(b) Lactose is less in the medium
(c) Lactose is more than glucose
(d) Glucose is enough in the medium
Answer: (c)
7. In a cell as per the Operon Concept, the regulator gene governs the chemical reactions by
(a) Inhibiting the substrate in the reaction
(b) Inhibiting migration of mRNA into cytoplasm
(c) mRNA transcription inhibited
(d) Enzyme-reaction inactivation
Answer: (d)
8. In Lac-operon, the gene product of LacA gene is
(a) Beta-galactoside permease
(b) Beta-galactoside transacetylase
(c) Beta-galactosidase
(d) Beta-galactoside isomerase
Answer: (b)
9. This condition in lac operon facilitates the condition of lac genes being transcribed at high levels
(a) low glucose, high lactose
(b) low glucose, low lactose
(c) high glucose, high lactose
(d) high glucose, low lactose
Answer: (a)
10. The correct option regarding the lac operon in E.coli from the following is
(a) Lac operon is switched on in the absence of lactose
(b) Lac repressor binds to the lac promoter
(c) β-galactosidase is the only enzyme produced in large quantities when lac operon is turned on
(d) lac operon messenger RNA is a polycistronic mRNA
Answer: (d)
Ketogenesis
1. Brain derives energy from ketogenesis, if glucose is
(a) less
(b) high
(c) constant
(d) zero
2. Which of the following amino acids are exclusively ketogenic?
(a) Asparagine
(b) Threonine
(c) Proline
(d) Leucine
3. Activated fatty acid is transported to mitochondria from cytosol by
(a) Creatinine
(b) Carnitine
(c) Creatine
(d) Clathrin
4. Ketone bodies are formed from
(a) Acetone
(b) Acetyl CoA
(c) Acetoacetate
(d) HCl
5. When the rate of synthesis of ketone bodies is more than its utilization, it leads to
(a) colour blindness
(b) diabetes
(c) anaemia
(d) ketonemia
6. Urine of a person contains abnormal quantities of ________ during prolonged fasting
(a) amino acids
(b) ketones
(c) glucose
(d) fats
7. Ketogenesis occurs primarily in ______ of liver cells
(a) Mitochondria
(b) Cytosol
(c) Endoplasmic reticulum
(d) Golgi apparatus
8. Organs that can utilise energy formed in ketogenesis are
(a) Brain
(b) Skeletal muscle
(c) Heart
(d) All of the above
9. Which of the following are ketone bodies
(a) acetoacetate
(b) acetone
(c) êžµ-hydroxy butyrate
(d) all of the above
10. Which of the following produce acetyl CoA directly
(a) Lysine
(b) Phenylalanine
(c) Isoleucine
(d) Alanine
Answer
Volvox
1. Coenobium refers to
(a) a group of filaments
(b) Palmelloid form
(c) A hollow spherical colony
(d) None of these
2. Algae with motile colony is
(a) Nostoc
(b) Spirogyra
(c) Chlamydomonas
(d) Volvox
3. In Chlorophyta, structure for protein and starch reserve is
(a) Pyrenoid
(b) Eye spot
(c) Volutin
(d) Paramylum
4. Volvox and Chlamydomonas are similar because they
(a) belong to Chlorophyta
(b) both are motile
(c) both (a) and (b)
(d) none of the above
5. Volvox belongs to which of the following classes of algae?
(a) Chlorophyceae
(b) Phaeophyceae
(c) Rhodophyceae
(d) Chrysophyceae
6. The chloroplast present in Volvox is
(a) cup-shaped
(b) ribbon-shaped
(c) girdle-shaped
(d) star-shaped
7. Sexual reproduction in Volvox is
(a) Isogamous
(b) Anisogamous
(c) Oogamous
(d) None of the above
8. Find the incorrect match
(a) Laminaria – Flattened leaf like thallus
(b) Volvox – Colonial, non flagellated
(c) Chlorella – Unicellular, non flagellated
(d) Chlamydomonas – Unicellular flagellated
9. The chlorophyll pigment present in Volvox are
(a) Chlorophyll a
(b) Chlorophyll b
(c) Chlorophyll e
(d) both (a) and (b)
10. Find the incorrect statement about Volvox
(a) Sexual reproduction is oogamous
(b) true coelom and no metamerism
(c) somatic cells are non flagellated
(d) phototaxis movement is present
Answer
Dinoflagellates
1. Dinoflagellates belong to
(a) Monera
(b) Protista
(c) Fungi
(d) Animalia
2. In which of the following organisms, the cell wall is made up of two overlapping shells?
(a) Chrysophytes
(b) Euglenoids
(c) Slime moulds
(d) Dinoflagellates
3. Most of the Dinoflagellates are
(a) Multicellular
(b) Unicellular
(c) Zooflagellates
(d) both (a) and (b)
4. Dinoflagellates are
(a) biflagellate
(b) uniflagellate
(c) they have many flagella
(d) non flagellate
5. Food reserve in Dinoflagellates is
(a) Alginic acid
(b) Fucoxanthin
(c) Starch
(d) Mannitol
6. Which of the following pigments are not present in Dinoflagellates?
(a) Fucoxanthin
(b) Chlorophyll a
(c) Chlorophyll b
(d) Chlorophyll c
7. Which of the following protozoans show bioluminescence?
(a) Opaline
(b) Noctiluca
(c) Paramecium
(d) Entamoeba
8. Marine phytoplankton is mostly represented by
(a) Brown algae
(b) Green algae
(c) Seaweeds
(d) Diatoms and Dinoflagellates
9. The function of pusule in Dinoflagellate is
(a) Osmoregulation
(b) Food production
(c) Food storage
(d) Movement
10. Dinoflagellates are
(a) Photosynthetic
(b) Holophytic
(c) Autotrophic
(d) All of these
Answer
Kranz Anatomy
1. Who discovered the C4 pathway?
(a) Melvin Kelvin
(b) Hatch and Slack
(c) Rudolph Markus
(d) Robert Brown
2. Which of the following is a C4 plant?
(a) Wheat
(b) Cactus
(c) Rice
(d) Sugarcane
3. C4 pathway takes place in
(a) Xylem
(b) Bundle sheath cells
(c) Phloem
(d) Mesophyll cells
4. Which of the following pathways of carbon fixation has phosphoenol pyruvate as a primary CO2 acceptor?
(a) C3 plant
(b) C4 plants
(c) both (a) and (b)
(d) C2 plants
5. Which of the following is true about bundle sheath cells present in the leaves having Kranz anatomy?
(a) they have thin walls with many intercellular spaces and chloroplasts are absent
(b) they have thin walls with no intercellular spaces and many chloroplasts
(c) they have thick walls with many intercellular spaces and few chloroplasts
(d) they have thick walls with no intercellular spaces and many chloroplasts
6. C4 pathway is a more efficient photosynthetic pathway than C3, because of
(a) lower photorespiration rate
(b) cells contain more chloroplasts in leaves
(c) larger leaf area
(d) spore formation
7. In leaves with Kranz anatomy, formation of malic acid during CO2 fixation occurs in
(a) epidermis
(b) phloem
(c) mesophyll
(d) bundle sheath
8. In C4 plants, Calvin cycle occurs in
(a) chloroplasts present in the grana of bundle sheath
(b) chloroplasts present in the grana of mesophyll
(c) chloroplasts present in the stroma of mesophyll
(d) chloroplasts present in the stroma of bundle sheath
9. The difference between C3 and C4 pathway is
(a) photorespiration
(b) Calvin cycle
(c) respiration
(d) glycolysis
10. The final product of C4 pathway is
(a) Malate
(b) Oxalate
(c) Acetate
(d) Aspartate
Answer
Protozoa
1. Unicellular eukaryotes are grouped in
(a) Monera
(b) Protista
(c) Archaea
(d) Fungi
2. Which of the following organisms will vanish if all the ponds and puddles are destroyed?
(a) Plasmodium
(b) Trypanosoma
(c) Leishmania
(d) Ascaris
3. In Amoeba and Paramecium, the cell organelle for osmoregulation is
(a) nucleus
(b) body surface
(c) contractile vacuole
(d) pseudopodia
4. Which class does the malarial parasite belong to?
(a) dinophyceae
(b) sarcodina
(c) ciliata
(d) sporozoa
5. Protozoa are classified on the basis of
(a) locomotory organelle
(b) shape
(c) number of nuclei
(d) size
6. Organ of defense in protozoans is
(a) statocysts
(b) trichocysts
(c) otocysts
(d) nematocysts
7. Which of the following is not a characteristic feature of prtozoans
(a) binary fission
(b) contractile vacuole
(c) cell membrane as an outer body covering
(d) pseudopodia
8. Which of the following class of protozoa does not generally contain contractile vacuole?
(a) Sporozoa
(b) Rhizopoda
(c) Flagellata
(d) Cilliata
9. Trypanosoma belongs to which of the following group?
(a) mastigophora
(b) sarcodina
(c) sporozoa
(d) ciliata
10. Which of the following protozoan causes African sleeping sickness
(a) Plasmodium vivax
(b) Entamoeba gingivalis
(c) Trypanosoma lewsii
(d) Trypanosoma gambiense
Answer
Reptilia
1. Find the correct statement about class Reptilia
(a) dry and cornified skin, epidermal scales and absence of external ears
(b) marine habitat, endoskeleton is cartilaginous and have placoid scales
(c) fresh-water habitat, bony endoskeleton and air-bladder for buoyancy
(d) moist skin and body is devoid of scales, the ear is represented by the tympanum
2. Reptilian ancestry of birds can be indicated by
(a) Eggs with the calcareous shell
(b) four-chambered heart
(c) scales on their hindlimb
(d) presence of crop and gizzard
3. Find the correctly matched pairs
(i) Sea Urchin – parapodia
(ii) Obelia – Metagenesis
(iii) Crocodile – four-chambered heart
(iv) Lemur – thecodont
(a) (ii), (iii) and (iv)
(b) only (i) and (ii)
(c) (i), (iii) and (iv)
(d) only (i) and (iv)
4. Uricotelism is found in
(a) frogs and toads.
(b) birds, land reptiles and insects
(c) mammals and birds
(d) fish and freshwater protozoans
5. Most reptiles are
(a) ammonotelic
(b) ureotelic
(c) ureotelic over land
(d) uricotelic
6. Animals that get most affected by the change in the environmental temperature are
(a) aquatic
(b) homeothermic
(c) poikilothermic
(d) desert living
7. Bones of the reptiles are covered by
(a) Keratin
(b) Chitin
(c) Calcium
(d) none of the above
8. Which of the following is a living fossil?
(a) Dinosaurs
(b) Snakes
(c) Tuatara
(d) Lizards
9. The respiratory organ in reptiles is
(a) gills
(b) epidermis
(c) skin
(d) lungs
10. Find the correctly matched pair without any exceptions
(a) Chondrichthyes- cartilaginous endoskeleton
(b) Reptilia- 3 chambered heart with undivided ventricle
(c) Mammalia- viviparous
(d) Chordata- have mouth with a lower and upper jaw
Answer
1. Which of the following is incorrect for ascomycetes
(a) they are unicellular as well as multicellular
(b) they are parasitic, saprophytic or coprophilous
(c) Neurospora, Claviceps and yeast belong to Ascomycota
(d) coenocytic mycelium
Answer: (d)
2. Dikaryophase and septate mycelium are characteristic features of which of the following class?
(a) Ascomycetes and Basidiomycetes
(b) Phycomycetes and Ascomycetes
(c) Deuteromycetes
(d) All of the above
Answer: (a)
3. Which of the fungi produces toxins in crop plants?
(a) Colleotrichum
(b) Aspergillus
(c) Penicillium
(d) both (b) and (c)
Answer: (d)
4. Which one of the following is incorrect
(a) Neurospora is widely used in genetic studies
(b) Yeast reproduces by budding
(c) Penicillium species are used in cheese production
(d) None of the above
Answer: (d)
5. Ergot is caused by
(a) Penicillium
(b) Rhizobium
(c) Claviceps
(d) Aspergillus
Answer: (c)
6. Which of the organism produces aflatoxin?
(a) fungi
(b) virus
(c) nematodes
(d) bacteria
Answer: (a)
7. Aspergillus has _______ hyphae
(a) aseptate and uninucleate
(b) aseptate and multinucleate
(c) septate and uninucleate
(d) septate and multinucleate
Answer: (d)
8. Dikaryon phase has
(a) diploid nucleus
(b) two similar nuclei
(c) two dissimilar haploid nuclei
(d) two haploid nuclei
Answer: (c)
9. Claviceps produces
(a) LSD
(b) marijuana
(c) ganja
(d) charas
Answer: (a)
10. Mycorrhiza shows
(a) endemism
(b) antagonism
(c) parasitism
(d) symbiosis
Answer: (d)
1. Slime moulds were included in which of the following kingdom?
(a) Monera
(b) Protista
(c) Fungi
(d) Plantae
Answer:(b)
2. Which of the following characteristic structure is found in slime mould?
(a) Pseudoelaters
(b) Elaters
(c) Capitulum
(d) Capillitium
Answer:(d)
3. Where does the spore formation occur in cellular slime mould?
(a) Plasmodium
(b) Sporangium
(c) Sporophore
(d) Pseudoplasmodium
Answer:(b)
4. Spores of slime moulds develop into
(a) Amoeboid cells
(b) Biflagellated cells
(c) Swarm cells
(d) All of the above
Answer:(d)
5. Which is the example of slime mould?
(a) Anabaena
(b) Rhizopus
(c) Physarum
(d) Thiobacillus
Answer:(c)
6. Slime moulds, algae, protozoa are related in having
(a) Eukaryotic cell
(b) Prokaryotic cell
(c) Flagella
(d) Pseudopodia
Answer:(a)
7. A characteristic feature of a “true slime mould” is
(a) Occurs as an independent cell
(b) A multinucleate plasmodial stage
(c) Secretes mucoidal exudate
(d) None of the above
Answer:(b)
8. Slug formation is induced by
(a) Over crowding
(b) Plentiful resources
(c) Both (a) and (b)
(d) Unfavourable conditions
Answer:(d)
9. Slime mould differ from fungi in having
(a) Phagocytosis mode of nutrition
(b) Amoeboid cells
(c) Both (a) and (b)
(d) None of the above
Answer:(c)
10. Sporangia of slime mould contain
(a) Haploid spores
(b) Diploid zygotes
(c) Gametes
(d) None of the above
Answer:(a)
1. Unicellular eukaryotes are grouped in
(a) Protista
(b) Monera
(c) Fungi
(d) Archaea
2. In Paramecium, osmoregulation occurs through
(a) body surface
(b) pseudopodia
(c) nucleus
(d) contractile vacuole
3. In Paramecium, genetic information is stored in
(a) all the nuclei present
(b) mitochondria
(c) micronucleus
(d) macronucleus
4. Phylum Protozoa is classified based on
(a) size
(b) shape
(c) number of nuclei
(d) locomotory organ
5. Conjugation as a mode of reproduction is present in
(a) ciliata
(b) flagellata
(c) sarcodina
(d) sporozoa
6. In Paramecium, food is ingested through
(a) cytoproct
(b) cytopyge
(c) cytosome
(d) cytopharynx
7. Trichocyst of Paramecium is required for
(a) osmoregulation
(b) nutrition
(c) reproduction
(d) defence
8. Paramecium are
(a) holophytic
(b) holozoic
(c) parasitic
(d) saprobiotic
9. In Paramecium, metabolic activities and growth is regulated by
(a) macronucleus
(b) micronucleus
(c) both (a) and (b)
(d) contractile vacuole
10. In Paramecium, both autogamy and conjugation are called sexual reproduction because of
(a) rejuvenation
(b) gene combination
(c) the fusion of haploid gametes
(d) involvement of two individuals
Answer
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