BHU B.Sc. Biology UET 2019 Question with Complete Solution
Q1. The main food reserve in fungal cells is :
Option (4). Glycogen is correct
Explanation : Glycogen is a branched polysaccharide serves as a source of energy (reserve food) in Animals, human & fungi starch : another variant of polysaccharides serves as a source of energy in plant tissues.
Glucose is a source of energy for body’s cells and sucrose commonly known as table sugar found in processed food and extracted from sugarcane.
Q2. Which part of moss capsule is haploid :
Option (3) Annulus is correct
Explanation : As, we know complete life cycle of masses requires two generation i.e. Gametophytic (sexual) form is haploid and second sporophytic (asexual) form is diploid (2n). In the given option calyptra, operculum and columella are of sprophytic (2n) i.e. in most masses the sporophyte will have these anatomical features so, out of given option only. Annulus is haploid (n).
Q3. Who is the following is related to phycology :
- Birbal Sahni
- R. Mishra
- K. C. Mehta
- M. O. P. Iyengar
Option (4) M.O.P. Iyengar is correct
Explanation : Study of Algae known as Algalogy or phycology & Father is M.O.P Iyengar
CODE : F M Fungi study Þ Mycology
A P Algae study Þ Phycology
Q4. Cycas and Adiantum resemble each other in having :
- Motile sperms
Option (2) Motile sperms is correct
Explanation : Cycas is a Gymnosperm & Adiantum is a pteridophyte since, seeds and cambium present in Gymnosperms but absent in Pteridophytes whereas vessel absent in both.
It is the motile sperm present in both that’s why option (2) is correct.
Q5. Cristae are found in which cell organelle ?
- Endoplasmic Reticulum
Option (2) Mitochondria is correct
Explanation : Crista is a folded structure present in inner membrane parts of mitochondria.
Q6. A chlorophyll molecule contains :
Option 4 Magnesium is correct.
Explanation : Iron – Haemoglobin
Sulphur – Most protein’s key component
Calcium – Element of Bone
Q7. How many citric acid cycles are required for each glucose molecule ?
Option (1) Two is correct
Explanation : Citric acid cycle goes around two times for each molecule of glucose that enters cellular resperation
because 1 Glucose molecule = 2 Acetyl CoA
therefore 2 cycles required per glucose molecule.
Q8. Coconut milk contains :
Option (2) Cytokinin is correct
Explanation : Kinetin is present in coconut milk is the liquid endosperm in unripened fruit & rich in plant hormone cytokinin.
Q9. Pappus is modification of :
Option (4) Calyx is correct
Explanation : In Asteraceae family, sepals (unit of calyx) modified into hair like structure called pappus.
Q10. Potato, tomato, brinjal, mustard and onion belong to how many families :
Option (2) : Three is correct
Explanation : From the given option we categorise examples of same families.
Potato, brinjal, tomato : Solanaceae
Mustard : Buassicaceae family
Onion : Liliaceae family
Hence, the given question includes 3 families
Q11. At which stage of mitosis, chromatids move towards the poles ?
Option (3) Anaphase is correct
Explanation: During Anaphase chromatids separate and move towards opposite poles.
Q12. Caruncle is found in seeds of :
Option (2) Ricinus is correct
Explanation: Caruncle is a structure present in micropylar region in Euphorbiaceae seeds.
Q13. Companion cells are closely associated with :
- Guard cells
- Medullary rays
- Vessel elements
- Sieve elements
Option (4) Sieve elements is correct Explanation: Companion cells are found in phloem of Flowering plants. Both sieve elements and companion cells are derceved from same meristematic cells that’s why both are closely associated
Q14. How many female flowers are found in a cyathium ?
Option (1) One is correct
Explanation: Ratio of Female to male flowers in Cyathium is one : many
Q15. Myrosin glands are found in :
Option (1) Mustard is correct
Explanation: Myrosin glands are found in Brassicaceae family helps in protection against herbivores.
Q16. Heterospory and ligulate leaves are the features of :
Option (2) Selagioella is correct
Explanation: Heterospory is a condition in which two kinds of spores of morphologically different types are borne by same plant.
Selaginella shows heterospory and have ligulate leaves.
Q17. The stele in Lycopodium stem is :
Option (4) Protostele is correct
Explanation: Stele is defined as central vascular cylinder with or without pith.
In Lycopodium the stele is protostelic.
Q18. Colchicine is used for :
- Polyploid production
- Pesticide Production
- Hermone Production
Option (2) Polypoid production is correct
Explanation: Colchicine is a toxic chemical used to induce polypoidy in plants.
Q19. First CO2 acceptor in C4 plants is :
- Oxalo-acetic acid
- Phosphoglyceric acid
- Phosphoenol pyruvate
- Ribulose 1, 5 diphoshate
Option (3) Phosphoenol pyruvate is correct
Explanation: In C4 plant, first Co2 acceptor is a 3- carbon molecule phosphoenol pyruvate (PEP) present in mesophyll cells.
Q20 . Codon is present on :
- t RNA
- r RNA
- m RNA
Option (4) mRNA is correct.
Explanation: Codon is present on mRNA
tRNA codes for anticodon.
Q21. Enzymes which take part in glycolysis are found in ?
- Endoplasmic reticulum
Option (2) Mitochondria is correct.
Explanation: Enzymes participating in Glycolysis called as Glycolytic enzymes located in Mitochondia.
Q22. Which of the following is known as C2 cycle ?
- Glycolate cycle
- T C A cycle
- Kreb’s cycle
- Calvin cycle
Option (1) Glycolate cycle is correct
Explanation: Since, photorespiration is a wasteful process, results in loss of Co2 by plants. It is also called as C2 cycle because the first stable product phosphoglysolic acid is 2- carbon compound.
Q23. Synthesis of DNA takes place in which stage ?
- G- 1 Phase
- G- 2 Phase
- S- phase
- G- 1 and S- phase
Option (3) S- phase is correct
Explanation: S- phase is the phase between Cn1 & Cn2 during which replccation of nuclear DNA & synthesis of hestone protein takes place. This phase is also known as DNA synthesis phase.
Q24. Which pyramid is always upright?
- Pyramid of Number
- Pyramid of Biomass
- Pyramid of Energy
- Pyramid of Energy and Number
Option (3) Pyramid of Energy is correct
Explanation : Pyramid of Energy is always upright because during transfer of energy from one trophic level to another, some energy is always lost in the form of heat in each step.
Q25. How much energy is transferred from one trophic level to another ?
Option (2) 10% is correct
Explanation : During one trophic level to other 10% energy is transferred and rest is lost as through metabolic processes as treat.
Q26. Axolotl is the larva of :
- Round worm
- Silk moth
Option (1) Ambystoma is correct
Explanation: Axolotl is the larva of Amblystrma tigrinum (tiger salamander). It shows structural features similar to typical salamander larvae.
Q27. Which of the following is the feature of Mammalia ?
- Presence of paired pharyngeal gill slits in adults
- Cranium and vertebral column is cartilaginous
- Presence of mid digital hair
- Presence of mammary glands
Option (4) Presence of mammary glands is correct
Explanation: The most unique and characteristics feature of mammalia is the presence of mammary gland.
Q28. Ostrich belongs to the class :
Option (2) Aves is correct
Explanation: Aves class includes crow, Columba (Pigeon), Psittacula (parrot), Struthio (ostrich) etc.
Q29. The concept of binomial nomenclature was given by :
Option (3) Linneaus is correct
Explanation: The concept of bionomial nomenclature was given by Carolus Linnaeus
Q30. Which one of the following ecological pyramids can never be inverted ?
- Pyramid of size
- Pyramid of energy
- Pyramid of biomass
- Pyramid of number
Option (2) Pyramid of energy is correct
Pyramid of Energy is always upright because during transfer of energy from one trophic level to another, some energy is always lost in the form of heat in each step.