MCQOPTIONS
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MCQOPTIONS
This section includes 1275 Mcqs, each offering curated multiple-choice questions to sharpen your Biology Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
On average there are _______ or more thylakoid per granum? |
| A. | 60 |
| B. | 50 |
| C. | 40 |
| D. | 70 |
| Answer» C. 40 | |
| 102. |
The study of fossils is called__________? |
| A. | Environmental Biology |
| B. | Historical biology |
| C. | Palaeontology |
| D. | Social biology |
| Answer» D. Social biology | |
| 103. |
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 |
| Answer» B. Microbiologists | |
| 104. |
Control of organisms by using living organisms is called_______? |
| A. | Bioremediation |
| B. | Integrated disease management |
| C. | Antisepsis |
| D. | Biological control |
| Answer» E. | |
| 105. |
Which one is a micromolecule__________? |
| A. | Polysaccharide |
| B. | Protein |
| C. | Hemoglobin |
| D. | ATP |
| Answer» E. | |
| 106. |
Under a compound microscope chromosome is made of arms and___________? |
| A. | Centromere |
| B. | Centrosome |
| C. | Chromatid |
| D. | Centromere |
| Answer» E. | |
| 107. |
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 |
| Answer» C. Tissue | |
| 108. |
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 |
| Answer» C. Ecosystem | |
| 109. |
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 |
| Answer» C. Marine biologist | |
| 110. |
An antibody is made of _________ polypeptide chains? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 111. |
How many spiracles are present in cockroach_____________? |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 40 |
| Answer» D. 40 | |
| 112. |
Out of total organisms on earth, _____________are vascular plants? |
| A. | 53.10% |
| B. | 19.90% |
| C. | 17.60% |
| D. | 9.40% |
| Answer» D. 9.40% | |
| 113. |
NADH is oxidized by___________? |
| A. | Coenzyme ? |
| B. | Cytochrome b |
| C. | Oxygen |
| D. | Glycolysis |
| Answer» B. Cytochrome b | |
| 114. |
In condition of high temperature, following does not occur or occurs at low level__________? |
| A. | Vasodilation |
| B. | Activation of sweat glands |
| C. | Thermogenesis |
| D. | Evaporative cooling |
| Answer» D. Evaporative cooling | |
| 115. |
In Hardy-Weinberg formula P2 represents frequency of_____________? |
| A. | Recessive allele |
| B. | Dominant allele |
| C. | Homozygous dominant individual |
| D. | Homozygous recessive individual |
| Answer» D. Homozygous recessive individual | |
| 116. |
Amphibians are considered to be evolved from___________? |
| A. | Newts |
| B. | Varanope |
| C. | Dipnoi |
| D. | Hagfishes |
| Answer» D. Hagfishes | |
| 117. |
Which of the following is the correct sequence in the biological method? |
| A. | Observation?hypothesis?law?theory |
| B. | Observation?hypothesis?deduction?testing of deduction |
| C. | Hypothesis?observation?deduction?testing of deduction |
| D. | law?theory?deduction?observation |
| Answer» C. Hypothesis?observation?deduction?testing of deduction | |
| 118. |
“lubb” sound is produced due to___________________? |
| A. | Opening of inlet valve |
| B. | Closure of inlet valve |
| C. | Opening of outlet valve |
| D. | Closure of outlet valve |
| Answer» C. Opening of outlet valve | |
| 119. |
Production of genetically identical copies of organisms/cells by asexual reproduction is called__________? |
| A. | Mitosis |
| B. | Replication |
| C. | Cloning |
| D. | Biological control |
| Answer» D. Biological control | |
| 120. |
_____________ supported theory of special creation? |
| A. | Linnaeus |
| B. | Aristotle |
| C. | Mendel |
| D. | Lamarck |
| Answer» B. Aristotle | |
| 121. |
Annual rainfall in grassland is about_____________? |
| A. | More than 2500 mm |
| B. | 750-1500 mm |
| C. | 250-750 mm |
| D. | Less than 250 mm |
| Answer» D. Less than 250 mm | |
| 122. |
Percentage of proteins in cell membrane is____________? |
| A. | 20-40% |
| B. | 40-50% |
| C. | 60-80% |
| D. | 80-100% |
| Answer» D. 80-100% | |
| 123. |
Who coined the term CELL? |
| A. | Schwann |
| B. | Schleiden |
| C. | Robert Hook |
| D. | Both a and b |
| Answer» D. Both a and b | |
| 124. |
Humming bird is an example of________________? |
| A. | Cold blooded animal |
| B. | Ectotherm |
| C. | Endotherm |
| D. | Heterotherm |
| Answer» E. | |
| 125. |
Joints present in skull are example of_______________? |
| A. | Fibrous joints |
| B. | Cartilaginous joints |
| C. | Synovial Joints |
| D. | Slightly moveable joints |
| Answer» B. Cartilaginous joints | |
| 126. |
Conversion of ammonia or ammonium ion into nitrites during nitrogen cycle occurs due_____________? |
| A. | Rhizobium |
| B. | Nitrosomonas |
| C. | Nitrobacter |
| D. | Pseudomonas |
| Answer» C. Nitrobacter | |
| 127. |
The human naked eye can differentiate between two points which are __________ apart? |
| A. | 1.0 mm |
| B. | 0.1 mm |
| C. | 1.0 cm |
| D. | 1.0 dm |
| Answer» B. 0.1 mm | |
| 128. |
An infectious disorder of respiratory system is_________________? |
| A. | Cancer |
| B. | Asthma |
| C. | Tuberculosis |
| D. | Emphysema |
| Answer» D. Emphysema | |
| 129. |
Cellulose is the major component of__________? |
| A. | Primary wall |
| B. | Secondary wall |
| C. | Middle lamella |
| D. | all of the above |
| Answer» B. Secondary wall | |
| 130. |
Ribosomes + m-RNA? |
| A. | Polysome |
| B. | Phlosome |
| C. | Polosome |
| D. | None of these |
| Answer» B. Phlosome | |
| 131. |
Enzymes __________________ the activation energy of a chemical reaction? |
| A. | Increases |
| B. | Decreases |
| C. | Does not effect |
| D. | Increases or decreases depending upon individual enzyme |
| Answer» C. Does not effect | |
| 132. |
_____________ is a nervous disorder characterized by involuntary tremors, diminished motor power and rigidity? |
| A. | Epilepsy |
| B. | Meningitis |
| C. | Alzheimer’s disease |
| D. | Parkinson’s disease |
| Answer» E. | |
| 133. |
Secretin inhibits production of__________________? |
| A. | Gastric juice |
| B. | Pancreatic juice |
| C. | Bile |
| D. | All of these |
| Answer» B. Pancreatic juice | |
| 134. |
Of the following which one is not the characteristic of mitochondria? |
| A. | It contains F1 particles |
| B. | It is involved in the synthesis of protein |
| C. | It is a self replicating organelle |
| D. | Number of mitochondria is constant |
| Answer» E. | |
| 135. |
The stent energy in the form of ADP is regenerated by mitochondria into__________? |
| A. | AMP |
| B. | ADP |
| C. | ATP |
| D. | All of these |
| Answer» D. All of these | |
| 136. |
Which of the following is not present in mitochondria? |
| A. | Enzymes |
| B. | Co-enzymes |
| C. | Ribosomes |
| D. | Thylakoids |
| Answer» E. | |
| 137. |
Yellowish glandular structure which produces progesterone is_____________? |
| A. | Graffian follicle |
| B. | Ovary |
| C. | Corpus luteum |
| D. | Placenta |
| Answer» D. Placenta | |
| 138. |
Which of the following combination is an example of self replicating organelles? |
| A. | Mitochondria Ribosomes |
| B. | Mitochondria Nucleus |
| C. | Mitochondria Chloroplast |
| D. | Mitochondria Vacuole |
| Answer» D. Mitochondria Vacuole | |
| 139. |
On which of the following component of chloroplast chlorophyll is arranged? |
| A. | Cell membrane |
| B. | Matrix |
| C. | Thylakoids |
| D. | Stroma |
| Answer» D. Stroma | |
| 140. |
XO-XX pattern of sex determination is present in______________? |
| A. | Grasshopper |
| B. | Butterfly |
| C. | Drosophila |
| D. | Man |
| Answer» B. Butterfly | |
| 141. |
The place of centromere where spindle fibres get attached is_________? |
| A. | Kinetochore |
| B. | Kinochore |
| C. | Centromere region |
| D. | all of these |
| Answer» B. Kinochore | |
| 142. |
Chlorophyll molecule contrains __________ as central metal ion. |
| A. | Fe2+ |
| B. | Mg2+ |
| C. | Zn2+ |
| D. | Cu2+ |
| Answer» C. Zn2+ | |
| 143. |
Number of cervical vertebrae is_____________? |
| A. | 5 |
| B. | 7 |
| C. | 9 |
| D. | 12 |
| Answer» C. 9 | |
| 144. |
Okazaki fragments are connected together through action of_________________? |
| A. | Primase |
| B. | Polymerase |
| C. | Helicase |
| D. | Ligase |
| Answer» E. | |
| 145. |
The part of chloroplast where CO2 is fixed to manufacture sugar is__________? |
| A. | Stroma |
| B. | Grana |
| C. | Thylakoid |
| D. | Outer membrane |
| Answer» B. Grana | |
| 146. |
An activated enzyme consisting of polypeptide chain and a cofactor is called_______________? |
| A. | Apoenzyme |
| B. | Holoenzyme |
| C. | Activated enzyme |
| D. | Both b and c |
| Answer» E. | |
| 147. |
Which of the following is an autosomal disorder______________? |
| A. | Down’s syndrome |
| B. | Klinifelter’s syndrome |
| C. | Turner’s syndrome |
| D. | Jacob’s syndrome |
| Answer» B. Klinifelter’s syndrome | |
| 148. |
Lock and Key model was proposed by______________? |
| A. | Emil Fischer |
| B. | Koshland |
| C. | Robin Williams |
| D. | Rudolph Virchow |
| Answer» B. Koshland | |
| 149. |
Ribonucleo-protein particles are the name of__________? |
| A. | DNA |
| B. | Nucleus |
| C. | Eukaryotic ribosomes |
| D. | RNA |
| Answer» D. RNA | |
| 150. |
Centrioles are composed of ________ triplets of microtubules. |
| A. | 3 |
| B. | 9 |
| C. | 10 |
| D. | 15 |
| Answer» C. 10 | |