Biology Related Tough Questions with Answers- 50 Nos
Total 50 Biology Related Tough Questions with Answers published on demand of Biolgy candidates.
No. of Questions: 50
Question paper format; txt
Answers : Available
Biology Related Tough Questions with Answers- Part-6
Question51:-Erythropoietin is secreted by
A:-Kidney
B:-Bone marrow
C:-Liver
D:-Lungs
Correct Answer:- Option-A
Question52:-Which of the following primary chordate characters are not lost even
after retrogressive metamorphosis in Ascidia
A:-Notochord
B:-Pharyngeal gill slits
C:-Dorsal tubular nerve cord
D:-Both (1) and (2)
Correct Answer:- Option-B
Question53:-Which of the following is false regarding B cells?
A:-Originate in bone marrow
B:-Differentiate in lymphoid tissue
C:-Surface immunoglobulin absent
D:-Mediate humoral immunity
Correct Answer:- Option-C
Question54:-Vaccination done for ______ is a toxoid preparation.
A:-Diphtheria
B:-Polio
C:-Rubella
D:-Varicella
Correct Answer:- Option-A
Question55:-According to Law of Bergonie and Tribondeau, the cells in their
descending order of sensitivity to radiation are
A:-Nerve cells, Muscle cells, Epithelial cells, Haematopoietic cells
B:-Muscle cells, Nerve cells, Haematopoietic cells, Epithelial cells
C:-Haematopoietic cells , Epithelial cells, Muscle cells, Nerve cells
D:-Epithelial cells, Muscle cells, Nerve cells, Haematopoietic cells
Correct Answer:- Option-C
Question56:-Following radioisotopes are commonly used in biological research. Their
half-life is mentioned in the bracket.
Which among them have the highest specific activity?
A:-Phosphorus-32 (14.3 days)
B:-Iodine-125 (60.4 days)
C:-Sulfur-35 (87.5 days)
D:-Tritium (12.4 years)
Correct Answer:- Option-A
Question57:-The fetal hormones which works as uterine stimulants to enable
parturition are
A:-Oxytocin
B:-Cortisol
C:-Prostaglandin
D:-Both (1) and (2)
Correct Answer:- Option-D
Question58:-Which statement regarding rigor mortis is correct?
A:-ATP can's mediate separation of cross bridges from actin filaments
B:-Muscles can no longer relax
C:-Muscles contract and become rigid even without action potential
D:-All of these
Correct Answer:- Option-C
Question59:-Which among the following is an immunologically privileged site?
A:-Eye
B:-Testis
C:-Central nervous system
D:-All of these
Correct Answer:- Option-D
Question60:-Position emission tomography is based on
A:-Coulomb scattering
B:-Pair production
C:-Pair annihilation
D:-Compton effect
Correct Answer:- Option-C
Biology Related Tough Questions with Answers- Part-7
Question61:-Which of the following are wrong pairs?
(i) Autoimmune haemolytic anaemia : Rh antigen
(ii) Graves disease : thyroid stimulating hormone receptor
(iii) Myasthenia gravis : Adrenaline receptor
(iv) Systemic lupus erythematosus : Rh antigen
A:-(i) and (ii)
B:-(ii) and (iii)
C:-(iii) and (iv)
D:-(i) and (iv)
Correct Answer:- Option-C
Question62:-Which of the following is wrong with respect to radionuclide used in
nuclear medicine?
(i) must emit gamma ray with the right energy to allow detection
(ii) mush have a short half-life
(iii) must be cheap
(iv) must be readily available
A:-(ii) only
B:-(i) only
C:-all of these
D:-none of these
Correct Answer:- Option-D
Question63:-Directional selection
(i) occurs due to the change in the environmental in particular direction
(ii) favors the phenotype which is non-average or extreme
(iii) eliminates normal or average individuals
(iv) keeps a population genetically constant
A:-(i), (ii) and (iii) are correct
B:-(i), (ii) and (iv) are correct
C:-only (iv) is correct
D:-(ii), (iii) and (iv) are correct
Correct Answer:- Option-A
Question64:-Oxytocin and vasopressin are structurally and functionally similar
nonapeptides secreted by the posterior pituitary. The difference between the two is
that
A:-Phenyl alanine and Arginine of Vasopressin are substituted by Isoleucine
and leucine in Oxytocin
B:-Phenyl alanine and Arginine of Oxytocin are substituted by Isoleucine and
leucine in Vasopressin
C:-Isoleucine and leucine of Vasopressin are substituted by cysteine and
tyrosine in Oxytocin
D:-Cysteine and tyrosine of Vasopressin are substituted by Isoleucine and
leucine in Oxytocin
Correct Answer:- Option-A
Question65:-Flowering can be induced in some plants by a cold treatment given to
a hydrated seed or to a growing plant. The process is known as
A:-Photoperiodism
B:-Temperature compensation
C:-Vernalization
D:-Floral evocation
Correct Answer:- Option-C
Question66:-State bird of Kerala is
A:-Buceros bicornis
B:-Malabar banded peacock
C:-Paradise flycatcher
D:-Pavo cristatus
Correct Answer:- Option-A
Question67:-Physiology of which sensation involves a hyperpolarizaton rather than
depolarization?
A:-Taste
B:-Smell
C:-Hearing
D:-Vision
Correct Answer:- Option-D
Question68:-Which of the complement activation pathways are antibody
independent?
A:-Classical pathway
B:-Lectin pathway
C:-Properdin pathway
D:-Both (2) and (3)
Correct Answer:- Option-D
Question69:-Which one of the following denote the correct order of the divisions of
the geologic time scale?
A:-Era, Epoch, Eon, Period, Age
B:-Eon, Era, Period, Epoch, Age
C:-Period, Age, Era, Epoch, Eon
D:-Epoch, Era, Period, Age, Eon
Correct Answer:- Option-B
Question70:-Which of the following is true with respect to passive immunity?
A:-Exposure to antigen occurs
B:-Immune system gets activated
C:-Immunity develops immediately
D:-Immunological memory develops
Correct Answer:- Option-C
Biology Related Tough Questions with Answers- Part-8
Question71:-Why are large amounts of solutes filtered and then reabsorbed by the
kidneys?
A:-Allows kidneys to rapidly remove waste products from the body
B:-Allows all the body fluids to be filtered and processed by the kidney many
times each day
C:-Both (a) and (b)
D:-None of the above
Correct Answer:- Option-C
Question72:-Antibiotic aminopterin added in the growth medium for production of
monoclonal antibodies, inhibits ________ synthesis.
A:-Nucleic acid
B:-Protein
C:-Lipid
D:-Carbohydrate
Correct Answer:- Option-A
Question73:-In chemical control of respiration, oxygen has a significant direct effect
on
A:-Respiratory center of brain
B:-Peripheral chemorceptors of carotid bodies
C:-Peripheral chemoreceptors of aortic bodies
D:-Both (2) and (c)
Correct Answer:- Option-D
Question74:-Zymogen activation by autocatalysis is shown by
A:-Chymotrypsin
B:-Trypsin
C:-Carboxypeptidase
D:-Elastase
Correct Answer:- Option-B
Question75:-Damage to the substantia nigra of basal ganglia results in
A:-Alzheimers
B:-Schizophrenia
C:-Parkinsons
D:-Both (1) and (3)
Correct Answer:- Option-C
Question76:-Which antibody complies the following characteristics : enters
secretion,crosses placenta, binds to macrophages/neutrophils
A:-IgM
B:-IgG
C:-IgE
D:-All of these
Correct Answer:- Option-B
Question77:-Glucose uptake from the lumen of small intestinal is an example of
A:-Simple diffusion
B:-Primary active transport
C:-Secondary active transport
D:-Filtration
Correct Answer:- Option-C
Question78:-Respiratory distress syndrome in premature babies can be caused by
A:-Increased surfactant production and larger radii of alveoli
B:-Increased surfactant production and smaller radii of alveoli
C:-Decreased surfactant production and larger radii of alveoli
D:-Decreased surfactant production and smaller radii of alveoli
Correct Answer:- Option-D
Question79:-Overall ability of antibodies to interact with antigen is called
A:-Cross reactivity
B:-Avidity
C:-Affinity
D:-Specificity
Correct Answer:- Option-B
Question80:-Which of the following combinations are correct?
(i) Widal's test-Typhoid-Agglutination test
(ii) Weil-Felix test-Rickettsial infections-Precipitation test
(iii) Wasserman test-Sypthilis-Complement fixation test
A:-(i) and (ii)
B:-(i) and (iii)
C:-(ii) and (iii)
D:-All of these
Correct Answer:- Option-B
Biology Related Tough Questions with Answers- Part-9
Question81:-Which of the following is not a type of tissue culture?
A:-Meristem culture
B:-Embryo culture
C:-Leaf culture
D:-Bacterial culture
Correct Answer:- Option-D
Question82:-Which of the following is an example of a tissue-engineered product
that has been approved for clinical use?
A:-Artificial heart valve
B:-Artificial kidney
C:-Artificial pancreas
D:-All of the above
Correct Answer:- Option-A
Question83:-Which of the following is a commonly used cryoprotectant in embryo
cryopreservation?
A:-Ethanol
B:-Dimethyl sulfoxide (DMSO)
C:-Formaldehyde
D:-Hydrogen peroxide
Correct Answer:- Option-B
Question84:-Choose the incorrect statement from the following
A:-Two components necessary for centromere function are satellite
sequences and CENP-B boxes
B:-The term telomere was introduced by Hermann J Muller
C:-T-loops are special structures seen in giant chromosomes
D:-The production of two functional centromeres is a key step in the transition
from metaphase to anaphase
Correct Answer:- Option-C
Question85:-What are induced pluripotent stem cells (iPSCs)
A:-Stem cells derived from adult tissues that have been reprogrammed to a
pluripotent state
B:-Stem cells derived from umbilical cord blood
C:-Stem cells derived from embryonic tissues
D:-Stem cells derived from bond marrow
Correct Answer:- Option-A
Question86:-What is the target antigen for trastuzumab (Herceptin)?
A:-CD20 (Cluster of differentiate 20)
B:-HER2 (Human Epidermal Growth factor receptor 2Q
C:-VEGF (Vascular Endotherlial Growth factor)
D:-PD-1 (Programmed Cell Death Protein 1)
Correct Answer:- Option-B
Question87:-Which of the following amino acids is nonpolar?
A:-Asparagine
B:-Glutamine
C:-Leucine
D:-Lysine
Correct Answer:- Option-C
Question88:-Which of the following is an example of a probiotic strain?
A:-Lactobacillus acidophilus
B:-E.coli O157:H7
C:-Salmonella typhi
D:-Streptococcus pyogenes
Correct Answer:- Option-A
Question89:-Which of the following is NOT involved in cell determination?
A:-Gene expression
B:-Environmental cues
C:-Cell migration
D:-Epigenetic modifications
Correct Answer:- Option-C
Question90:-How do morphogenetic gradients influence tissue development?
A:-They direct cells to differentiate into specific cell types
B:-They control cell proliferation and survival
C:-They regulate cell migration and adhesion
D:-All of the above
Correct Answer:- Option-D
Biology Related Tough Questions with Answers- Part-10
Question91:-Which of the following is the correct order of events in oogenesis?
A:-Meiosis II, ovulation, meiosis I, fertilization
B:-Meiosis I, Ovulation, Meiosis II, fertilization
C:-Ovulation, Meiosis I, Meiosis II, fertilization
D:-Ovulation, Meiosis II, Meiosis I, fertilization
Correct Answer:- Option-C
Question92:-Which of the following is a result of capacitation?
A:-Acrosome reaction
B:-Sperm motility
C:-Sperm maturation
D:-Sperm differentiation
Correct Answer:- Option-A
Question93:-What is the signification of meroblastic cleavage?
A:-It allows for the formation of a blastula
B:-It a allows for the development of large eggs with lots of yolk
C:-It allows for the formation of specialized cells and tissues
D:-It sets the stage for gastrulation and organogenesis
Correct Answer:- Option-B
Question94:-Which of the following is true about teratogenesis?
A:-It is always caused by exposure to environmental toxins
B:-It can occur at any stage of development
C:-It is always reversible
D:-It only affects humans
Correct Answer:- Option-B
Question95:-Which of the following is a protein complex involved in dosage
compensation in mammals?
A:-Sry
B:-Hox
C:-Xist
D:-SOX9
Correct Answer:- Option-C
Question96:-Which of the following is true about exons and introns?
A:-Exons are transcribed into RNA and introns are not
B:-Introns are transcribed into RNA and exons are not
C:-Both exons and introns are transcribed into RNA
D:-Exons and introns are not involved in transcription
Correct Answer:- Option-C
Question97:-Morphologically indistinguishable but genetically different populations
are called
A:-A sexual species
B:-Cryptic species
C:-Cohesion species
D:-Biological species
Correct Answer:- Option-B
Question98:-How is the absence of the H antigen related to the presence of the A
and B antigens?
A:-The A and B antigens are modified forms of the H antigen
B:-The A and B antigens are completely unrelated to the H antigen
C:-The A and B antigens are formed independently of the H antigen
D:-The A and B antigens are produced in the absence of the H antigen
Correct Answer:- Option-A
Question99:-Which of the following is a recently discovered species of primates?
A:-Gorilla beringei
B:-Pan troglodytes
C:-Pongo tapanuliensis
D:-Homo sapiens
Correct Answer:- Option-C
Question100:-Scientists discovered a new organ in the human body that had gone
unnoticed till recently . What is the name of this organ?
A:-Mesentery
B:-Interstitium
C:-Submucosa
D:-Reticular organ
Correct Answer:- Option-A
Comments
Post a Comment