MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 5751 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 4051. |
Thoracic cage of man is formed of (M.P.P.M.T.2002) |
| A. | Ribs and sternum |
| B. | Ribs,sternum and thoracic vertebrae |
| C. | Ribs,sternum and lumbar vertebrae |
| D. | Ribs and thoracic vertebrae. |
| Answer» C. Ribs,sternum and lumbar vertebrae | |
| 4052. |
Respiratory centre of brain is stimulated by (A.I.I.M.S 2000) |
| A. | Carbon dioxide content in venous blood |
| B. | Carbon dioxide content in arterial blood |
| C. | Oxygen content in venous blood |
| D. | Oxygen content in arterial blood |
| Answer» E. | |
| 4053. |
Bicarbonate formed inside erythrocytes moves out to plasma while chloride of plasma pass into erythrocytes.The phenomenon is called (Kerala 2001,2003) |
| A. | Bicarbonate shift |
| B. | Carbonation |
| C. | Hamburger phenomenon |
| D. | None of the above |
| Answer» D. None of the above | |
| 4054. |
Carbon monoxide contained in Tobacco smoke (A.I.E.E.E.2003) |
| A. | Is carcinogenic |
| B. | Causes gastric ulcers |
| C. | Reduces oxygen carrying capacity of blood |
| D. | Raises blood pressure |
| Answer» D. Raises blood pressure | |
| 4055. |
Trachea is lined with incomplete rings of (D.P.M.T.1996) |
| A. | Fibrous cartilage |
| B. | Calcified cartilage |
| C. | Elastic cartilage |
| D. | Hyaline cartilage |
| Answer» E. | |
| 4056. |
Which one protects the lungs? (B.H.U.1990) |
| A. | Ribs |
| B. | Vertebral column |
| C. | Sternum |
| D. | All the above |
| Answer» E. | |
| 4057. |
Vital capacity of lung is equal to (Karnataka 2002) |
| A. | IRV+ERV+TV |
| B. | IRV+ERV+TV-RV |
| C. | IRV+ERV+TV+RV |
| D. | IRV+ERV |
| Answer» B. IRV+ERV+TV-RV | |
| 4058. |
Which one has the lowest value? |
| A. | Tidal volume |
| B. | Vital capacity |
| C. | Inspiratory reserve volume |
| D. | Expiratory reserve volume |
| Answer» B. Vital capacity | |
| 4059. |
Hiccough (hiccup) is due to activity of (Manipal 2001) |
| A. | Intercostal muscles |
| B. | Food in air tract |
| C. | Diaphragm |
| D. | Inadequate oxygen in environment |
| Answer» D. Inadequate oxygen in environment | |
| 4060. |
The cells which do not respire (A.FMC.2001) |
| A. | Epidermal cells |
| B. | Sieve cells |
| C. | Cortical cells |
| D. | Erythocytes |
| Answer» E. | |
| 4061. |
Haemoglobin is (CB.S.E.1999) |
| A. | Vitamin |
| B. | Skin pigment |
| C. | Blood carrier |
| D. | Respiratoy pigment |
| Answer» E. | |
| 4062. |
A molecule of haemoglobin carries how many oxygen molecules ((M.P.P.M.T.1997,Tamil Nadu 2001,C.F.M.T.2002,J.CM.E.E.2004) |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 4063. |
Exchange of gases in lung alveoli occurs through (CB.S.E.1998,A.FMC.2002) |
| A. | Active transport |
| B. | Osmosis |
| C. | Simple diffusion |
| D. | Passive transport |
| Answer» D. Passive transport | |
| 4064. |
SARS is caused by a variant of (A.I.I.M.S 2004) |
| A. | Pneumococcus pneumonia |
| B. | Common cold by Corona virus |
| C. | Asthma |
| D. | Bronchitis |
| Answer» C. Asthma | |
| 4065. |
Increase in CO2 concentration shall cause (CB.S.E.2004) |
| A. | Slower and shallower breathing |
| B. | Slower and deeper breathing |
| C. | Faster and deeper breathing |
| D. | No effect on breathing |
| Answer» D. No effect on breathing | |
| 4066. |
A higher CO2 concentration of blood causes (AM U.2001) |
| A. | Slow diffusion of co2 from blood |
| B. | Slow transport of CO2 from blood |
| C. | Slow diffusion of o2 from blood |
| D. | Both A and B |
| Answer» D. Both A and B | |
| 4067. |
In carbon monoxide poisoning there is (A.F.M.C 1997) |
| A. | Increase in carbon dioxide concentration |
| B. | Decrease in oxygen availability |
| C. | Decrease in free haemoglobin |
| D. | None of the above. |
| Answer» D. None of the above. | |
| 4068. |
Dead space is (Manipal 2003) |
| A. | Upper respiratory tract |
| B. | Nasal chambers |
| C. | Alveolar space |
| D. | Lower respiratory tract. |
| Answer» B. Nasal chambers | |
| 4069. |
Gases diffuse over the respiratory surface because of (Manipal 2002) |
| A. | O2 is more in alveoli than in blood |
| B. | O2 is more in blood than in tissues |
| C. | CO2 is more in alveoli than in blood |
| D. | PCO2 is more in blood than in tissues |
| Answer» B. O2 is more in blood than in tissues | |
| 4070. |
About 1500 ml of air left in lungs is called (CB.S.E.1996) |
| A. | Tidal volume |
| B. | Inspiratory reserve volume |
| C. | Residual volume |
| D. | Vital capacity |
| Answer» D. Vital capacity | |
| 4071. |
Pneumococcus experiment proved that (AFMC - 1993) |
| A. | Bacteria do not reproduce asexuallly |
| B. | Bacteria undergo binary fission |
| C. | DNA is genetic material |
| D. | RNA may sometimes control a production of DNA and protein |
| Answer» D. RNA may sometimes control a production of DNA and protein | |
| 4072. |
Select the two correct statement out of the four statement given below about “ Lac opern”(AIPMT-2010) |
| A. | ii and iii |
| B. | i and iii |
| C. | ii and iv |
| D. | i and ii |
| Answer» D. i and ii | |
| 4073. |
Best method to determine paternity is |
| A. | Protein analysis |
| B. | chromosome counting |
| C. | gene counting |
| D. | DNA finger printing |
| Answer» E. | |
| 4074. |
DNA is copied from m-RNA molecule with help of |
| A. | Restriction enzyme |
| B. | Reverse transcriptase |
| C. | DNA polymerase |
| D. | Adenosine deaminase |
| Answer» C. DNA polymerase | |
| 4075. |
Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a “triplet” (AIPMT - 2009) |
| A. | Hershey and chase |
| B. | Morgan and sturtevant |
| C. | Beadle and Tatum |
| D. | Nirenberg and Mathai |
| Answer» E. | |
| 4076. |
Correct sequenceof code transfer during polypeptide formation is (AIIMS -1999) |
| A. | DNA , mRNA , t RNA and amino acids |
| B. | DNA , t RNA , r RNA and m RNA |
| C. | m RNA , t RNA , DNA and amino acids |
| D. | r RNA , DNA ,m RNA and t RNA |
| Answer» B. DNA , t RNA , r RNA and m RNA | |
| 4077. |
Out of 64 codons 61 code for 20 types of aminoacids It is due to (CBSE - 2002) |
| A. | Overlapping genes |
| B. | Degeneracy of genetic code |
| C. | Wobbling of codons |
| D. | Universality of codons |
| Answer» C. Wobbling of codons | |
| 4078. |
The lac opern consists of (AIPMT - 2010) |
| A. | four regulatory genes only |
| B. | One regulatory gene and three structural genes |
| C. | Two regulatory genes and three structural genes |
| D. | three regulatory genes and three structural genes |
| Answer» D. three regulatory genes and three structural genes | |
| 4079. |
If one strand of DNA has the nitrogenous base sequence as ATCTG, What would be thecomplementary RNA strand Sequence (AIPMT - 2012) |
| A. | TTAGU |
| B. | UAGAC |
| C. | AACTG |
| D. | ATCGU |
| Answer» C. AACTG | |
| 4080. |
Polysome is formed by (AIPMT - 2008) |
| A. | a ribosome with several subunits |
| B. | ribosomes attached to each other in a linear arrangement |
| C. | several ribosomes attached to a single m RNA |
| D. | many ribosomes attached to a strand of endoplasmic reticulum |
| Answer» D. many ribosomes attached to a strand of endoplasmic reticulum | |
| 4081. |
A DNA nucletotide chain has A G C T T C G A sequence The nucleotide sequence of other chain would be |
| A. | T C G A A G C T |
| B. | G C T A A G C T (AFMC - 1993) |
| C. | T A G C A T A T |
| D. | G A T C C T A G |
| Answer» B. G C T A A G C T (AFMC - 1993) | |
| 4082. |
In operan concept, the operator gene combines with (AIIMS -1986) |
| A. | Regulator protein to switch off structural gene transcription |
| B. | Regulator protein to switch on structural gene transcription |
| C. | Inducer to switch off structural gene transcription |
| D. | Regulator gene to switch off structural gene transcription |
| Answer» B. Regulator protein to switch on structural gene transcription | |
| 4083. |
RNA that picks up specific aminoacid from amino acid pool of cytoplasm to carry it to ribosome during protein synthesis is |
| A. | t RNA |
| B. | m RNA |
| C. | r RNA |
| D. | g RNA |
| Answer» B. m RNA | |
| 4084. |
VNTR is employed for (AMU - 2002) |
| A. | Protoplasmic culture |
| B. | DNA finger printing |
| C. | Regulation of plant growth hormones |
| D. | Enhancing photosynthesis in desert plant |
| Answer» C. Regulation of plant growth hormones | |
| 4085. |
Antiparallel strands of a DNA molecule means that (AIPMT - 2006) |
| A. | One strand turns clockwise |
| B. | One strand turns anticlockwise |
| C. | The phosphate groups of two DNA strands , at their ends share the same position |
| D. | The phosphate groups at the start of two DNA strands are is opposite position (Pole). |
| Answer» E. | |
| 4086. |
Heat killed pathogenic cells and live non pathogenic cells are mixed and injected into MiceThe result would be (Kerala - 2001) |
| A. | Mice develop disease and die |
| B. | Mice die without developing disease |
| C. | Mice remain healthy |
| D. | 50% mice develop discease and die |
| Answer» B. Mice die without developing disease | |
| 4087. |
The 31 - 51Phosphodiester linkages inside a potynucleotide chain serve to join AIPMT - 2010) |
| A. | One DNA strand with the other DNA strand |
| B. | One nucleoside with another nucleoside |
| C. | One nucleotide with another nucleotide |
| D. | One nitrogen base with pentose sugar |
| Answer» D. One nitrogen base with pentose sugar | |
| 4088. |
Okazaki fragments are joined by enzyme (Kerala 2005) |
| A. | DNA helix |
| B. | DNA ligase |
| C. | DNA polymerase II |
| D. | RNA polymerase II |
| Answer» C. DNA polymerase II | |
| 4089. |
Which one of the following does not follow the central dogma of molecular biology ? (AIPMT - 2010) |
| A. | Pea |
| B. | Mucor |
| C. | Chlamydomonas |
| D. | HIV |
| Answer» E. | |
| 4090. |
A functional unit in synthesis of protein is (MPPMT - 1994) |
| A. | Lysosome |
| B. | Peroxisome |
| C. | Polysome |
| D. | Dictyosome |
| Answer» D. Dictyosome | |
| 4091. |
Ribosomal RNA is actively synthesized by |
| A. | Lysosomes |
| B. | nucleolus |
| C. | nucleoplasm |
| D. | ribosomes |
| Answer» C. nucleoplasm | |
| 4092. |
Semiconservative DNA replication using 15 N was demonstrated by (AIIMS -1994) |
| A. | Meselson |
| B. | Taylor |
| C. | Meselson and stahl |
| D. | Hershey and chase |
| Answer» D. Hershey and chase | |
| 4093. |
Termination of polypeptide chain is brought about by |
| A. | UUG , UAG and UCG |
| B. | UAA , UAG and UGA |
| C. | UUG , UGC and UCA |
| D. | UCG , GCG and ACC |
| Answer» C. UUG , UGC and UCA | |
| 4094. |
Which person is suffering from disease according to given sentences ? |
| A. | Mahesh walks slowly & become tired. |
| B. | There is appearance of scaly lesions on skin of naresh. |
| C. | Paresh is suffering from vomiting. |
| D. | All of them suffer from disease. |
| Answer» E. | |
| 4095. |
Give the correct Sequence for endo erythrocytic cycle ? |
| A. | Metacry ptomerozoites-Trophozoite-Schizont-in RBC-Gametocyte-Merozoites. |
| B. | Metacry ptomerozoiter-in RBC-Trophozaite-Schizant-Merozoites-Gametocyte |
| C. | Metacry ptomerozoites-in RBS -Trophozoite-Merozoites-Schizont-Gametocyte |
| D. | Cryptomerozoite-in RBC-Trophozoite-Schizont-Merozoites-Gametocyte |
| Answer» C. Metacry ptomerozoites-in RBS -Trophozoite-Merozoites-Schizont-Gametocyte | |
| 4096. |
What is the location of Salmonella typhi during diseased condition ? |
| A. | Stomach |
| B. | Kidney |
| C. | Liver |
| D. | Intestine |
| Answer» E. | |
| 4097. |
From which kind of host life cycle of plasmodium passes ? |
| A. | Male of Human & of Anopheles mosquito. |
| B. | Male of Human & Male of Anopheles mosquito. |
| C. | Human & Female Anopheles mosquito. |
| D. | Human & Male Anopheles mosquito. |
| Answer» E. | |
| 4098. |
According to their production which one is odd ? |
| A. | Cannabinoid |
| B. | Marjuana |
| C. | Ganja |
| D. | Charas |
| Answer» C. Ganja | |
| 4099. |
In figure what is indicated by "P" ? |
| A. | Hydrogen bond |
| B. | Ionic bond |
| C. | Disuphlide bond |
| D. | Hydrophobic bond |
| Answer» D. Hydrophobic bond | |
| 4100. |
Mark odd one ? |
| A. | Cancer of breast |
| B. | Cancer of lung |
| C. | Cancer of stomach |
| D. | Cancer of muscle |
| Answer» E. | |