Biology MCQs: October 2018

Tuesday, October 9, 2018

Which of the following mechanism explains development of anemia in Renal failure??

A. Failure of bone marrow is accompanied with renal failure.
B. Destruction of RBC results from accumulated urea in the blood.
C. Chronicity of the disease is respobsible for anemia
D. Failure of proper RBC synthesis, due to lack of chemical stimulation.

Rose is an example of____________??

A. Hydrophytes
B. Mesophytes
C. Xerophytes
D. Halophytes

E. coli and example of entrobacteriace is important for causing diarrheal diseases its size is____________??

A. 0.1-600 um
B. 100-200 nm
C. 1.1-1.5 um (width) 2.0-6.0 um (length)
D. 0.75-1.25 um

The size of Spirochete is_____________??

A. 0.1 -600 um
B. 100-200 nm
C. 500 um
D. 0.75-1.25 um

Which of the following structure is not present in all the bacteria_____________??

A. Cell membrane
B. Chromatin bodies
C. Ribosomes
D. Capsule

Which of the following statement is incorrect regarding germ theory of diseases postulated by Robert Koch_____________??

A. A specific organism can always be found in association with a given disease
B. The organism can be isolated and grown in pure culture in the laboratories
C. The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from pure culture can do so.
D. It is possible to recover the organism in pure culture from the experimentally infected animals

Who discovered the bacteria causing tuberculosis and also developed various techniques of media preparation and maintenance of pure culture_____________??

A. Robert Koch
B. Louis Pasteur
C. Alexander Fleming
D. Leeuwenhoek

Who coined the term Animalcules for microorganisms like Bacteria and protozoa______________??

A. Robert Koch
B. Louis Pasteur
C. Alexander Fleming
D. Leeuwenhoek

The word Archaeobacteria (a division of bacteria) derived from Greek means___________??

A. True bacteria
B. False bacteria
C. Recent bacteria
D. Ancient bacteria

In which of the following pigments major energy reserves and cell wall are like plants??

A. Rhodophyta
B. Chlorophyta
C. Phaeophyta
D. Chrysophyta

Which of the following statement is incorrect about algae______________??

A. Their zygote unlike plants is protected by parental tissue
B. Their classification is based on pigment composition
C. Most of them have different morphological forms in-different stages of their life cycle
D. Almost all of them are aquatic

Most of the photosynthesis on earth is carried by__________??

A. Kelps
B. Gymnosperms
C. Angiosperms
D. Algae

Of the following which one has glassy shells________________??

A. Radiolarians
B. Forams
C. Both of these
D. None of these

The only group of algae having no flagellated motile cells at any stage is___________??

A. Chrysophyta
B. Phaeophyta
C. Pyrrophyta
D. Rhodophyta

Chalk is gradually formed of dead______________??

A. Actinopods
B. Foraminiferans
C. Apicomplexans
D. Radiolarians

Brown algae are also known as___________??

A. Phaeophyta
B. Rhodophyta
C. Pyrrophyta
D. Chrysophyta

The drfinite shape to ciliates is given by____________??

A. Pellicle
B. Penicle
C. Calcium
D. Cell wall

Golden algae are also known as___________??

A. Chrysophyta
B. Phaeophyta
C. Pyrrophyta
D. Rhodophyta

Complex specialized flagellates living symbiotically in the gut of termites are___________??

A. Trichonymphas
B. Trypanosoma
C. Euglena
D. Radiolarians

Based on molecular data euglenoids are thought to be closely related to___________??

A. Dinoflagellates
B. Zooflagellates
C. Protozoans
D. Algae

Stentor is a/an____________??

A. Ciliate
B. Foraniniferan
C. Actinopods
D. Apicomplexan

All phostosynthetic euglenoids lose their chlorophyll when grown in dark and obtain their nutrients heterotrophically this statement is___________??

A. True
B. False
C. May be true may be false
D. Unpredictable

Kingdom protista includes_____________phyla??

A. 27
B. 28
C. 26
D. 29

Most dinoflagellates are___________??

A. Unicellular
B. Multicellular
C. Both of these
D. Zooflagellates

Plasmodium belongs to__________??

A. Ciliates
B. Apicomplexans
C. Actinopods
D. Foraminferans

The most important group of producers in marine ecosystem is of__________??

A. Diatoms
B. Euglenoids
C. Dinoflagellates
D. Brown algae

Lime stone deposits are formed from__________??

A. Zooflagellates
B. Foraminferans
C. Aetinopods
D. Apicomplexans

Of the following which one is not the characteristic of dinoflagellates??

A. Most of them are unicellular
B. They have blooms
C. Their cells are often covered with shells of interlocking cellulose plates impregnated with calcium
D. None of these

Examples of Rhodophytes are___________??

A. Chondrus
B. Polysiphonia
C. Both of these
D. Pinnularia

Which of the following statement about eiliates in incorrect_____________??

A. Contain mainly unicellular organisms.
B. Their contractile vacoule is respobsible for water regulation.
C. They are even capable of sexual reproduction.
D. Diploid nucleus being smaller is responsible for cells metabolism and growth while polyploidy nucleus functions in sexual process.

In chlorophytes the main energy stores are__________??

A. Cellulose
B. Starch
C. Glycogen
D. All of these

Radiolarians belong to which of the following protozoal group____________??

A. Zooflagellates
B. Actinopods
C. Foraminifera
D. Apicomplexans

Of the following which one is not the characteristic of green algae??

A. Some green algae possess cell wall with cellulose
B. They are generally accepted as the ancestors of green plants
C. Chlorella is unicellular non-motile green algae
D. None of these

Which of the protozoa has a striking resemblance to collar cells in sponges_____________??

A. Zooflagellates
B. Choanflagellates
C. Trypanosomoa
D. Trichonymphas

In slime molds spores develop into__________??

A. Swarm cells
B. Biflagellated cells
C. Amoeboid reproductive cells
D. All of these

Who first separated bacteria from other protists as a group_____________??

A. John Hogg
B. Ernst Haeckel
C. Margulis and Schwartz
D. Herbert Copeland

Spores produced by slime molds are__________??

A. Haploid
B. Diploid
C. Triploid
D. None of these

Which of the following statement about Kingdom Protista is incorrect_______________??

A. Their members have characteristics which separate them from other kingdoms
B. They only include unicellular aquatic eukaryotic organisms
C. They do not develop from Blastula or embryo
D. They contain ancestors for fungi plants

Which of the following is responsible for Irish potato famine??

A. Dinoflagellates
B. Kleps
C. Physarum polycephalum
D. Phytophthora infestans

Fungi can tolerate pH from____________??

A. 3-7
B. 2-6
C. 2-9
D. 3-6

Spores in sporangia are produced by process??

A. Sexual
B. Asexual
C. Both of these
D. None of these

Mycorrhizae are found in about__________vascular plants??

A. 90%
B. 95%
C. 98%
D. 96%

Which of the following statement is incorrect about asexual reproduction by spores in fungi??

A. Spores are haploid structures
B. They are dispersed via wind water and insects
C. On falling to a suitable place they germinate
D. These are produced through fruiting bodies like ascocarps and basidiocarps.

Type of lichen which tightly attaches to rocks is_____________??

A. Parmelia
B. Fruticose
C. Foliose
D. Crustose

Simple breaking of mycelium resulting in formation of a new mycelium from each broken segments is called__________??

A. Sporing
B. Conidiation
C. Budding
D. Fragmentation

Constricting ring around nematode is formed by_____________??

A. Arthrobotrys
B. Pleurotus ostreatus
C. Mildews
D. All of these

By which of the following mechanism unicellular yeast reproduce??

A. Sporing
B. Conidiation
C. Budding
D. Fragmentation

Parasitic fungi absorb nutrients directly from the living host cytoplasm with the help of special hyphal tips called___________??

A. Mildew
B. Constricting ring
C. Haustoria
D. All of these

Unicellular fungi which is non-hyphal is___________??

A. Mushroom
B. Yeast
C. Penicillium
D. Mold

In which of the following example of fungi dikaryotic hyphae exist for long period??

A. Deuteromycota
B. Basidiomycota
C. Zygomycota
D. All of these

Coenocytic hyphae are also known as______________??

A. Septate
B. Perforated hyphae
C. Aseptate
D. Uninucleate hyphae

Which of the following is called black bread mold??

A. Pilobolus
B. Penicillium
C. Neurospora
D. Rhizopus

The mechanism for ATP synthesis is_____________??

A. Chemosynthesis
B. Photosynthesis
C. Phosphorylation
D. Chemiosmosis

Fungi resemble plants because they lack___________??

A. Cell wall
B. Cytoplasm
C. Centriole
D. Nucleus

Which of the following statement is incorrect about antibiotics??

A. They are used against microorganisms
B. They are always effective against bacteria
C. They are used in diseases like tuberculosis and pneumonia
D. They are derived from bacteria only

Which disease has been totally eradicated from the world because of effective vaccination??

A. Measles
B. Polio
C. Small pox
D. Hepatitis

Vaccine was first developed by_______________??

A. Louis Pasture
B. Edward Jenner
C. Jaber Ibn Hayan
D. Aristotle

Protein factory is___________??

A. nucleus
B. ribosome
C. golgi complex
D. centriole

Smallest disease causing agents in plants are ??

A. virion
B. mycoplasma
C. viroids
D. prions

The major cell infected by the HIV is lymphocyte ??

A. helper-T
B. B
C. both T and B
D. none of these

Which disease can be controlled by vaccination??

A. Measles
B. Cancer
C. Diabetes
D. Heart attack

What is the mode of transmission of Hepatitis virus??

A. Aerosol
B. Parentral (via blood)
C. Skin penetration
D. Unknown

Nitrogen is present in___________??

A. carbohydrates
B. proteins
C. lipids
D. carbonates

Enzyme present in the saliva is_____________??

A. lipase
B. trypsin
C. ptyalin
D. invertase

Removal or degradation of environmental pollutants or toxic materials by living organisms is called__________??

A. Integrated disease management
B. Hydroponic culture technique
C. Pasteurization
D. Bioremediation

True roots absent in_____________??

A. ferns
B. bryophytes
C. gymnosperms
D. angiosperms

Which treatment is instituted in a cancerous patient??

A. Antibiotic therapy
B. Radiotherapy
C. Gene therapy
D. None of these

Nutrition in fungi is___________??

A. Photosynthetic
B. Chemosynthetic
C. Completely parasitic
D. Absorptive heterotrophs

Pigment present in red algae is_____________??

A. fucoxanthin
B. phycocyanin
C. phycoerythrin
D. bilirubin

Which statement is incorrect for cloning??

A. The nucleus of a fertilized egg is replaced by the nucleus from the cell of a fully developed individual
B. Division of a single egg into one or more separate embryos.
C. The individual is the mirror image of the parent organism
D. It involve methods of sexual reproduction

Which is a parasitic plant??

A. cuscuta
B. rose
C. ferns
D. mosses

In human body 99% of total mass is formed of_____________??

A. 16 Bio-elements
B. 12 Bio-elements
C. 10 Bio-elements
D. 6 Bio-elements

Which of the following is not a viral disease??

A. Cowpox
B. Mumps
C. Tetanus
D. Small pox

Which statement is incorrect for pasteurization??

A. It is used to preserve yogurt and milk
B. It was developed by Louis Pasteur.
C. It involves heating the substance at high temperature for just few sec.
D. It can be used to preserve vegetables and meat.

Number of chromosomes in
E.coli ??

A. 1
B. 2
C. 4
D. 6

Astronauts may use which technique to grow fruits and vegetables ??

A. Tissue culture techniques
B. Cloning
C. Pasterisation
D. Hydroponic culture technique

Messenger RNA is formed in_________??

A.nucleus
B.chloroplast
C.mitochondria
D.none of these

Production of genetically identical copies of organisms/cells by asexula reproduction is called ??

A. Mitosis
B. Replication
C. Cloning
D. Biological control

Co-enzyme is often formed from ??

A. lipid
B. protein
C. inorganic ion
D. vitamin

Breeders have developed new and better varieties of food items by using which technique??

A. Pasteurization
B. Hydroponic culture technique
C. Genetic engineering
D. Biological control techniques

Starch is converted into maltose by??

A. diastase
B. invertase
C. maltase
D. amylase

Conclusion of Mendels work latter became a_____________??

A. Scientific hypothesis
B. Theory
C. Scientific law
D. Productive theory

Which one is not correct for a productive theory??

A. It is predictive
B. It has explanatory power
C. It discourages suggestion of different hypotheses
D. None of these

Which are the four most abundant elements in living cells ??

A. carbon, oxygen, nitrogen, sulfur
B. carbon, oxygen, hydrogen, nitrogen
C. carbon, oxygen, sulfur, phosphorus
D. carbon, sulfur, hydrogen, magnesium

A series of hypothesis supported by the results of many tests is called ??

A. Scientific law
B. Theory
C. Data
D. Deduction

Which is an organic compound found in most cells ??

A. Water
B. Glucose
C. Oxygen
D. Sodium chloride

Biological sciences have a set methodology and it is based on ??

A. Experimental inquiry
B. Esthetic preference
C. Philosophical ideas
D. Imaginations

Proteins are made from amino acids by the process of ______________??

A. Hydrolysis
B. Pinocytosis
C. Dehydration synthesis
D. Active transport

An unbroken series of species arranged in ancestors to descendent sequence with each later species having evolved from one that immediately preceded it is called??

A. Biome
B. Phyletic lineage
C. Community
D. Population

Sodium ions are “pumped” from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of?

A. Diffusion
B. Passive transport
C. Osmosis
D. Active transport

It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect??

A. Older sediment layers have equal amount of these radioactive isotopes as that of the young ones
B. Older sediment layers have less amount of these radioactive isotopes as that of the young ones.
C. Older sediment layers have greater amount of these radioactive isotopes as that of the young ones.
D. Older sediment layers did not have these radioactive isotopes

Normally, in the process of osmosis, the net flow of water molecules into or out of the cell depends upon differences in the ??

A. Concentration of water molecules inside and outside the cell
B. Concentration of enzymes on either side of the cell membrane
C. Rate of molecular motion on either side of the cell membrane
D. None of these

The concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time squence came from the studies by ??

A. Environmental biologist
B. Paleontologist
C. Marine biologist
D. Social biologist

Most cell membranes are composed principally of ??

A. DNA ad protein
B. Protein and Lipids
C. Protein and Chitin
D. Protein and RNA

A large regional community primarily determined by climate is called ??

A. Population
B. Community
C. Biome
D. Habitat

Which of the following pathogen type cause disease that can be treated with antibiotics ??

A. bacteria
B. fungi
C. virus
D. none of these

Different species of plants and animals living in the same habitat is called??

A. Population
B. Community
C. Biome
D. Habitat

The evaporative cooling in the respiratory tract of dogs is called??

A. Vasodilation
B. Vasoconstriction
C. Panting
D. All of these

Group of living organisms of the same species living in the same place at the same time is called ??

A. Community
B. Population
C. Ecosystem
D. Biome

Production of sweat and sebum is related with ??

A. Skin
B. Liver
C. Lungs
D. GIT

In animals coordination is achieved by means of??

A. Nervous system
B. Endocrine system
C. Respiratory system
D. Both A and B

Haemodialysis means cleaning of____________??

A. Urine
B. Blood
C. Glomerular filterate
D. Coelomic fluid

A structure formed by groups of similar cells organized into loose sheets or bundles performing similar functions is called as:?

A. An organ
B. An organism
C. A Tissue
D. A Cell

Which one of them is a micro-molecule??

A. Polysaccharide
B. Protein
C. Hemoglobin
D. ATP

The atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called:?

A. An organ
B. A molecule
C. Tissue
D. Both a and c

Oxygen accounts for ____ % of totals human body mass??

A. 65%
B. 18%
C. 10%
D. 3%

___________ are needed as a source of energy for the vital activities of the body??

A. Calcium
B. Iron
C. Water
D. Carbohydrates

Out of 92 naturally occurring chemical elements how many are considered as bio-elements??

A. 6
B. 16
C. 26
D. 15

__________ is essential for the formation of hemoglobin.?

A. Calcium
B. Iron
C. Water
D. Carbohydrates

The branch of biology which deals with the study of social behavior and communal life of human beings living in any environment is called ??

A. Environmental biology
B. Social biology
C. Human biology
D. Both b and c

Blood is carried towards the heart by __________??

A. Arteries
B. Capillaries
C. Veins
D. none of these

Sythetic insulin from pork was formed by which technique??

A. Biotechnology
B. Social biological techniques
C. Parasitology
D. Both a and c

On wound __________ fight foreign particles, like bacteria??

A. White Blood cells
B. Red Blood Cells
C. Platelets
D. Plasma

The experiments on DNA molecules in chromosomes for knowing the basis of inherited diseases are conducted by ??

A. Molecular biologists
B. Microbiologists
C. Freshwater biologists
D. Social biologist

About __________ of the body weight of a mammal is water ??

A. 60%
B. 65%
C. 70%
D. 75%

The study of fossils is called??

A. Environmental Biology
B. Historical biology
C. Palaeontology
D. Social biology

The average internal temperature of human body is __________??

A. 35 oC
B. 36 oC
C. 37 oC
D. 38 oC

Which Vitamin is needed for the formation of a light-sensitive pigment in the retina.?

A. Vitamin A
B. Vitamin C
C. Vitamin D
D. B complex

Which character differentiates living things from non-living organisms??

A. They live in the same ecosystem.
B. They are highly organized and complex made of one or more cells and contain genetic material
C. They are acted upon by the same environment
D. Both a and b

People living in high altitudes (like mountains) usually have a _________??

A. smaller number of Red Blood Cells
B. larger number of Red Blood Cells
C. smaller number of White Blood Cells
D. larger number of White Blood Cells