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Biology MCQs Online Quiz Test With Solved Answers
Q.1: Severe deficiency of Vitamin-D results in?
- scurvy
- rickets
- night blindness
- osteomalacia
B
Q.2: People living in high altitudes (like mountains) usually have a?
- smaller number of Red Blood Cells
- larger number of Red Blood Cells
- smaller number of White Blood Cells
- larger number of White Blood Cells
B
Q.3: The average adult has a blood volume of about -------- liters?
- 5
- 5.5
- 6
- 6.5
A
Q.4: The average internal temperature of human body is?
- 35 °C
- 36 °C
- 37 °C
- 38 °C
C
Q.5: Vitamin -------- is needed for the formation of a light-sensitive pigment in the retina?
- A
- C
- D
- B complex
A
Q.6: About -------- of the body weight of a mammal is water?
- 60%
- 65%
- 70%
- 75%
C
Q.7: On wound -------- fight foreign particles, like bacteria?
- White Blood cells
- Red Blood Cells
- Platelets
- Plasma
A
Q.8: Blood is carried towards the heart by?
- Arteries
- Capillaries
- Veins
- none of these
C
Q.9: -------- is essential for the formation of haemoglobin?
- Calcium
- Iron
- Water
- Carbohydrates
B
Q.10: --------- are needed as a source of energy for the vital activities of the body?
- Calcium
- Iron
- Water
- Carbohydrates
D
Q.11: Starch is converted into maltose by?
- diastase
- invertase
- maltase
- amylase
A
Q.12: Co-enzyme is often formed from?
- lipid
- protein
- inorganic ion
- vitamin
B
Q.13: Messenger RNA is formed in?
- nucleus
- chloroplast
- mitochondria
- none of these
A
Q.14: Number of chromosomes in E.coli?
- 4
- 6
- 3
- 1
D
Q.15: Protein factory is?
- nucleus
- ribosome
- golgi complex
- centriole
D
Q.16: Smallest disease causing agents in plants are?
- virion
- mycoplasma
- viroids
- prions
C
Q.17: The major cell infected by the HIV is lymphocyte?
- helper-T
- B
- both T and B
- none of these
A
Q.18: Pigment present in red algae is?
- fucoxanthin
- phycocyanin
- phycoerythrin
- bilirubin
C
Q.19: Nutrition in fungi is?
- photosynthetic
- chemosynthetic
- completely parasitic
- absorptive heterotrophs
D
Q.20: Fungi resemble plants because they lack?
- cell wall
- cytoplasm
- centriole
- nucleus
C
Q.21: Which is a parasitic plant?
- cuscuta
- rose
- ferns
- mosses
A
Q.22: True roots absent in?
- ferns
- bryophytes
- gymnosperms
- angiosperms
B
Q.23: The mechanism for ATP synthesis is?
- chemosynthesis
- photosynthesis
- phosphorylation
- chemiosmosis
D
Q.24: Enzyme present in the saliva is?
- lipase
- trypsin
- ptyalin
- invertase
C
Q.25: Nitrogen is present in?
- carbohydrates
- proteins
- lipids
- carbonates
B
Q.26: The food is ground in the cockroach in?
- mesenteron
- crop
- gizzard
- intestine
C
Q.27: Operculum is present in?
- bony fish
- sea fish
- cartilaginous fish
- none of these
A
Q.28: In which animal respiratory surface are found in more than one organ?
- birds
- human
- fish
- frog
D
Q.29: The heart is enclosed in a membrane called?
- pleura
- pericardium
- peritoneum
- epithelium
B
Q.30: From right ventricle blood is pushed into?
- pulmonary trunk
- brain
- aorta
- body
A
Q.31: Which one is abundant in lymph?
- oxygen
- lipids
- water
- proteins
D
Q.32: Jaws without teeth are found in found in?
- birds
- reptiles
- fish
- none of these
A
Q.33: Male reproductive part of flower is?
- stigma
- stamen
- carpel
- ovule
B
Q.34: Coordination in plants is by?
- nervous system
- enzymes
- hormones
- roots
C
Q.35: The simplest fatty acid is?
- palmitic acid
- butyric acid
- oleic acid
- acetic acid
D
Q.36: All enzymes are protein which are?
- globular
- fibrous
- helical
- all of these
A
Q.37: Cilia are produced from?
- mitochondria
- cell-membrane
- centriole
- cytoplasm
C
Q.38: Which of the following disease is not caused by virus?
- T.B
- AIDS
- HIV
- flu
A
Q.39: Which of the following is a filamentous alga?
- ulva
- chlorella
- acetabularia
- spirogyra
D
Q.40: Which of the following is not sac fungi?
- truffles
- yeasts
- mushrooms
- morels
C
Q.41: ‘Cassia fistula’ is the scientific name of?
- amaltas
- rose
- onion
- tomato
A
Q.42: Phage virus consists of head and?
- thorax
- neck
- tail
- none of these
C
Q.43: Bacteria without any flagella are called?
- monotrichous
- atrichous
- peritrichous
- lophotrichous
B
Q.44: Protists have been evolved from?
- animals
- plants
- fungi
- prokaryotes
D
Q.45: Algae differ from plants in that the sex organs in algae are?
- multicellular
- unicellular
- acellular
- none of these
B
Q.46: Fungi can absorb food from the substrate because the have?
- sporangium
- spores
- rhizoids
- stalk
C
Q.47: A seed may be defined as a fertilized?
- egg
- ovary
- ovule
- embryo
C
Q.48: Platyhelminthes means?
- round worms
- flat worms
- tape worms
- pin worms
B
Q.49: The first land vertebrates were?
- dipnoi
- amphibia
- reptilia
- aves
B
Q.50: All life on planet earth is powered by?
- solar energy
- thermal energy
- tidal energy
- kinetic energy
A
Q.51: Recombinant DNA is introduced in to host cell by means of?
- phage
- vector
- bacteria
- enzyme
B
Q.52: In cystic fibrosis, the patient lacks a gene that codes for trans-membarene carrier of?
- sodium ion
- carbon dioxide
- chloride ion
- potassium ion
C
Q.53: Which gene is located on linkage group number 11 in man?
- sickle cell anemia
- leukemia
- albinism
- all of these
D
Q.54: In birds the sex is determined by the type of?
- sperm
- autosomes
- egg
- none of these
C
Q.55: In RNA nucleotides are attached by?
- peptide bonds
- hydrogen bonds
- covalent bond
- phosphodiester bond
D
Q.56: The chromosome is?
- gene
- genes + protein
- DNA + genes
- gene + protein
B
Q.57: The human body contains water?
- 60-80%
- 70-90%
- 75-95%
- 80-90%
B
Q.58: Environment is a source of?
- food
- shelter
- clothing
- all of these
D
Q.59: Fresh water ecosystem covers?
- 2%
- 1%
- 3%
- 5%
B
Q.60: Foul smell in lake is produced by?
- algae
- bacteria
- fungi
- all of these
D
Q.61: Starch is richly present in?
- onion
- apple
- cereals
- tomato
C
Q.62: Plants having foreign DNA are known as?
- genetic plants
- recombinant plants
- cultured plants
- transgenic plants
D
Q.63: Which of the following kinds of atom do not occur in carbohydrates?
- carbon
- hydrogen
- nitrogen
- oxygen
C
Q.64: The basic framework of all types of membranes are?
- lipoproteins
- glycoproteins
- proteoglycans
- nucleoproteins
A
Q.65: Single membrane bounded organelle is?
- nucleus
- lysosome
- ribosome
- none of these
B
Q.66: Irregular grape like cluster of bacilli is called?
- diplo bacilli
- strepto bacilli
- staphylo bacilli
- none of these
C
Q.67: It is generally accepted that plants arose from ancestral?
- green algae
- fungi
- bacteria
- all of these
A
Q.68: Main energy reserves in the case of green algae are?
- glycogen
- sucrose
- glucose
- starch
D
Q.69: The chief component of the cell wall of the majority of fungi is?
- pectin
- chitin
- lignin
- cellulose
B
Q.70: After pollination the pollens are transferred to which part of the flower?
- ovary
- style
- stigma
- none of these
C
Q.71: Glyoxisomes contain enzymes for?
- glyoxylate cycle
- glycolate cycle
- Calvin cycle
- none of these
A
Q.72: Vacuoles serve to?
- expand the plant cells
- sites for storage
- both in expansion and storage
- non-specific function
C
Q.73: An isolated virus is not considered living since it?
- separate into two parts
- cannot metabolize
- rapidly looses its genome
- all of these
B
Q.74: The predominant phycobilin pigment in cyanobacteria which is of blue colour is?
- phycoerythrin
- phycocyanin
- fucocyanin
- fucoxanthin
B
Q.75: Deafness is caused by misuse of?
- penicillin
- tetracycline
- paracetamol
- streptomycin
D
Q.76: Cell envelope does not include?
- capsule
- slime layer
- cell wall
- cell membrane
D
Q.77: Coenocytes is a fungal body which is?
- multi-nucleate aseptate
- multi-nucleate septate
- uni-nucleate septate
- uni-nucleate aseptate
A
Q.78: Bryophytes are?
- all heterosporous
- all homosporous
- mostly homosporus
- none of these
B
Q.79: Nephridia are excretory organs in?
- round worms
- lizard
- earth worm
- planaria
C
Q.80: Which one is harmful mollusc?
- slug
- snail
- oyester
- star fish
A
Q.81: Which structure is involve in gaseous exchange of plants?
- stomata
- lenticels
- cuticle
- all of these
D
Q.82: Common feature of human and insect trachea is?
- non-collapsiable wall
- supporting rings
- ectodermal origin
- endodermal origin
A
Q.83: Vomiting occurs due to?
- constipation
- diarrhoea
- antiperistalsis
- peristalsis
C
Q.84: Photosynthetic prokaryotes lack?
- ribosomes
- chloroplast
- cell-membrane
- vacuole
B
Q.85: Which of the following organ is because of absence of teeth in birds?
- crop
- syrinx
- stomach
- gizzard
D
Q.86: The scientific name of jelly fish is?
- Aurelia
- Madrepore
- Actinia
- Obelia
A
Q.87: In which plants leaves are always in whorls?
- lycopsids
- psilopsids
- sphenopsids
- pteropsids
C
Q.88: In bacterial and viral infection, their is increase in number of?
- platelets
- RBC’s
- antibodies
- WBC’s
D
Q.89: In plants, which are involved in testa formation?
- tracheids
- sclereids
- sclerenchyma
- none of these
B
Q.90: The etiolated plants lack?
- chlorophyll
- xanthophyll
- caroteins
- none of these
A
Q.91: Highly intelligent mammals are?
- rat
- bat
- dolphin
- elephant
C
Q.92: Plants absorb most part of water needed by them through their?
- stem
- root hairs
- leaf
- bark
B
Q.93: One of the following is not a function of bones?
- support
- production of blood cells
- protein synthesis
- muscle attachment
C
Q.94: Movement of cell against concentration gradient is called?
- active transport
- osmosis
- diffusion
- both b and c
A
Q.95: Pollination is best defined as?
- germination of pollen grains
- transfer of pollen from anther to stigma
- formation of pollen grains
- none of these
B
Q.96: DNA structure was first described by?
- Pasteur
- Robert Koch
- Watson and Crick
- Carlous Linnaues
C
Q.97: Spermology is the study of?
- Neurogenic heart
- Myogenic heart
- Pulsating heart
- Ampullary heart
B
Q.98: Spermology is the study of?
- Seed
- Leaf
- Fruit
- Pollen grain
A
Q.99: Who is known as father of Zoology?
- Darwin
- Aristotle
- Lamark
- Theophrastus
B
Q.100: The most abundant element in the Earth’s atmosphere is?
- Oxygen
- Nitrogen
- Hydrogen
- Carbondioxide
- None of these
B