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Objective Questions

Latest USET Life Science Exam Question (Objective Questions), MCQ in English

Subjects : Life Sciences

Question Bank Uttarakhand SET Life Science Exam - English
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Life Sciences

Question 1Single Answer
When Ramesh was at the age of 8 years, he hammered a nail into a large tree to mark his height. If the tree grows 2 cm/year, how much higher would the nail be after 6 years?
  1. A
    5 cm higher
  2. B
    0 cm higher
  3. C
    10 cm higher
  4. D
    8 cm higher
Question 2Single Answer
The molar fraction of hydrochloric acid extremely dilute aqueous solution is The pH of the resulting solution is-
  1. A
    approximately doubled
  2. B
    approximately halved
  3. C
    increased
  4. D
    reduced
Question 3Single Answer
Approximately how much blood flows the through a normal human heart beating 70 times per minute, having a relaxed volume 110 cc and compressed volume of 70cc?
  1. A
    7150 litres
  2. B
    4000 litres
  3. C
    28000 litres
  4. D
    11100 litres
Question 4Single Answer
A leaf appears green in daylight. If this leaf were observed in red light, what colour would It appear to have?
  1. A
    green
  2. B
    black-brown
  3. C
    red
  4. D
    blue
Question 5Single Answer
The distance from Nehrunagar to Gandhinagar is 27 km. A and B start walking from Nehrunagar towards Gandhinagar speeds of 5 km/hr and 7 km/hr, respectively. B reaches Gandhinagar, return immediately, and meets A at Indiranagar. What is the distance between Nehrunagar and Indiranagar?(assume all three cities to be in one straight line)
  1. A
    12.5km
  2. B
    22.5km
  3. C
    4.5km
  4. D
    13.5km
Question 6Single Answer
football and cricket, 15% play both basketball and cricket 10% play both football and Basketball 15 students play no games, while 5% of the students play all three games. What is the total number of students?
  1. A
    300
  2. B
    250
  3. C
    350
  4. D
    400
Question 7Single Answer
A 100 m long fence is to be made by fixing a wire mesh on steel poles. Each pole has a 1m vertical portion and a l m portion tilted at 450  to the vertical. What will be the area of wire mesh required?
  1. A
    200m2
  2. B
    241.4m2
  3. C
    400m2
  4. D
    170.7m2
Question 8Single Answer
The average staff salary of a company Rs.8000/-. A new guard and a new manager recruited with salaries of Rs.5000/- and Rs.20000 respectively. What is the current staff stridence if the new average salary  Rs.4000/-more that of the guard?
  1. A
    7
  2. B
    9
  3. C
    10
  4. D
    11
Question 9Single Answer
A bird flies along the three sides of a field in the shape of an equilateral triangle at speeds of 2, 4, 8 km/hr, respectively. The average speed of bird is-
  1. A
    24/7km/hr
  2. B
    14/3 km/hr
  3. C
    22/7 km/hr
  4. D
    4 km/hr
Question 10Single Answer
A buys n copies of a book at 20% discount. B gets the same book at 30% discount. What is the minimum value of n for which B can buy one extra copy of the book, spending the same amount as A?
  1. A
    7
  2. B
    8
  3. C
    6
  4. D
    This problem cannot be solved unless the marked price of the book is known.
Question 11Single Answer
The number of three English letter words, having at least one consonant, but not having two consecutive consonants, is
  1. A
    2205
  2. B
    3780
  3. C
    2730
  4. D
    3360
Question 12Single Answer
There are two gas parcels of equal volume, A and B at the same temperature and pressure. Parcel A is one mole of water vapour, while parcel B is one mole of dry air. Which of the following is TRUE?
  1. A
    Parcel A is heavier then Parcel B
  2. B
    Parcel B is heavier than Parcel A
  3. C
    Both parcels are equally heavy
  4. D
    Without temperature and pressure data their relative masses cannot be determined
Question 13Single Answer
For which of the following numbers is its positive square roof closest to the number itself ?
  1. A
    0.33
  2. B
    0.99
  3. C
    0.89
  4. D
    0.10
Question 14Single Answer
Which one of the following ʵ proteinst both as an activator and repressor of transcription?
  1. A
    cl protein/cl
  2. B
    Nprotein/N
  3. C
    cll protein/cil
  4. D
    Q protein/Q
Question 15Single Answer
One of the mechanisms used by bacteria for  adaptation to changed environment is altering
transcription of their genes. In this regard which one of the following responses is NOT found in bacteria?
  1. A
    A gene with two different promoters for expression in different conditions.
  2. B
    Use of different sigma factors for transcription of genes.
  3. C
    Expression of alternate a, B and B' subunits
  4. D
    Expression of anti-sigma factors
Question 16Single Answer
During eukaryotic cell division, metaphase to anaphase transition is regulated by degradation of -
  1. A
    Cyclin B1
  2. B
    CDK 1
  3. C
    Aurora A kinase
  4. D
    Polo-like kinase
Question 17Single Answer
Which one of the following statements about chromatin is NOT true?
  1. A
    DNA winds approximately 1.65 times around the nucleosomes .
  2. B
    H2A-H2B bind to both the entry and exit ends of DNA in nucleosomes.
  3. C
    Covalent modification of histones influence chromatin compaction.
  4. D
    Non-histone proteins are part of mitotic chromosomes.
Question 18Single Answer
Select a cellular body which is NOT a part of the nuclear bodies
  1. A
    P-bodies
  2. B
    Nucleolus
  3. C
    Cajal bodies
  4. D
    Interchromatin granule clusters
Question 19Single Answer
In a signalling event, binding of an extracellular ligand activates G-protein coupled receptor (GPCR) that eventually activates phospholipase C-B. Which one of the following statements truly reflects the function of phospholipase C-B?
  1. A
    Phospholipase C-B converts PI (3.4.5) P3, to PI (4,5) P2
  2. B
    Phospholipase C-B converts PI (4) P to PI (4,5)P2
  3. C
    Phospholipase C-B converts PL (4,5) P. to diacylglycerol and IP3
  4. D
    Phospholipasse C-B converts PI (5)P to PI (4,5)P2
Question 20Single Answer
The ф and Ψ values of a B-strand composed of all D-amino acids will mainly occupy which quadrant in the Ramachandran plot?
  1. A
    upper left
  2. B
    upper right
  3. C
    lower left
  4. D
    lower right
Question 21Single Answer
What is the effect of sudden increase in the levels of ATP and citrate on an erythrocyte undergoing glycolysis?
  1. A
    It inhibits glycolysis
  2. B
    It stimulates glycolysis
  3. C
    The rate of glycolysis remains unaltered
  4. D
    The rate of glycolysis increases gradually
Question 22Single Answer
Indicate the INCORRECT statement from the following:
  1. A
    Allosteric enzymes function through reversible noncovalent binding of allosteric modulators or effectors
  2. B
    Monoclonal antibodies that catalyze hydrolysis of esters carbonates can be produced
  3. C
    Enzymes are not inhibited irreversibly by heavy metals such as Hg2+, Ag+./ Hg2+, Ag+
  4. D
    Acid phosphatases hydrolyze biological phosphate esters at ~pH5.0/~PH5.0
Question 23Single Answer
Choose the correct statement from the following:
  1. A
    Disulfide bonds in a 20-residue peptide can be formed only if the cysteines are adjacent to each other.
  2. B
    The amino acids isoleucine has only one chiral centre.
  3. C
    Both bases and sugar contribute to chirality of nucleic acids.
  4. D
    The pl of aspartic acid is less than glutamic acid
Question 24Single Answer
In a given experiment, transplantation of micromeres from the vegetal pole of a 16-cell sea urchin embryo onto the animal ploleof a host 16-cell sea urchin embryo would initiate.
  1. A
    the transplanted micromeres to invaginate into the blastocoel to create a new skeletogenic mesenchyme cells
  2. B
    the transplanted micromeres to ingress the blastocoel to create a new skeletogenic mesenchymal cells.
  3. C
    the transplanted micromeres will mingle with the host micromeres to ingress into the blastocoels to create skeletogenic mesenchyme cells.
  4. D
    the transplanted micromeres will form the secondary archenteron.
Question 25Single Answer
Based on ABC model during flower development, loss of class A activity results in the formation of only stamen and carpel. Which of the following floral organ identity genes controls the class A activity?
  1. A
    APETALA 1 and APETALA 2
  2. B
    APETALA 3 and PISTILLATA
  3. C
    Only PISTILLATA
  4. D
    Only AGAMOUS
Question 26Single Answer
Which one of the following statements regarding limb development in mice is true?
  1. A
    The gene encoding Tbx5 is transcribed in the limb fields of the hindlimbs.
  2. B
    The gene encoding Tbx4 is transcribed in the limb fields of the forelimbs/Tbx4.
  3. C
    Genes encoding Islet I. Tbx4 and Pitx are expressed in the presumptive hindlimb.
  4. D
    Genes encoding Islet 1. Tbx4 and Pits are expressed in the presumptive forelimb.
Question 27Single Answer
Match the following cleavage patterns with the species in which they occur.
     Species                                              Cleavage Pattern
A.Flatworm                                     i.Meroblastic discoidal
B.Frog                                           ii.Meroblastic superficial
C.Birds                                          iii.Holoblastic displaced radial
D.Insect                                         iv.Holoblastic spiral
  1. A
    A-iv, B-iii.C-i, D-ii
  2. B
    A-iii, B-i, C-iv, D-ii
  3. C
    A-ii, B-iii,C-i, D-iv
  4. D
    A-ii, B-iv, C-iii, D-i
Question 28Single Answer
Which one of the following human serum immunoglobulins takes part in classical complement fixation pathway?
  1. A
    IgD
  2. B
    IgE
  3. C
    IgA
  4. D
    IgG
Question 29Single Answer
Junctions which tether cytoskeletal filaments inside the cell are known as -
  1. A
    anchoring junctions
  2. B
    occluding junctions
  3. C
    channel-forming junctions
  4. D
    signal-relaying junctions
Question 30Single Answer
Which one of the following is a group of Signalling molecules that act as morphogens during development of an organism and its effects are mediated through the receptor Patched and its binding partner Smoothened?
  1. A
    Hedgehog protein
  2. B
    Notch protein
  3. C
    Wnt protein
  4. D
    B-catenin
Question 31Single Answer
Proteins with cytoplasmic domains having tyrosine kinase activity do NOT act as receptors for
  1. A
    Epidermal growth factor (EGF)
  2. B
    Platelet -derived growth factor (PDGF)
  3. C
    Insulin
  4. D
    Transferrin
Question 32Single Answer
During eukaryotic protein synthesis, stress conditions result in activation of specific kinases leading to phosphorylation of a key translation initiation factor that inhibits protein synthesis from a large number of cellular mRNA. Which one of the following factors is the target of the kinase?
  1. A
    elF4E
  2. B
    eIF4G
  3. C
    eIF2a
  4. D
    Gen4
Question 33Single Answer
A highly specific inhibitor that targets the phosphorylation activity TFIIH is ad, in vitro transcription reaction. Which One of the following steps is most likely to be affected?
  1. A
    Binding of RNA polymerase to promoter sequene
  2. B
    Promoter clearance
  3. C
    Recruitment of TFIID
  4. D
    Open promoter complex information
Question 34Single Answer
In a linkage map, two genes A and B, are 70 cm apart. If individuals heterozygous for both the genes are test crossed number of progeny  with parental phenotype will be:
  1. A
    equal to the number of progeny with recombinant phenotype.
  2. B
    more than the number of progeny with recombinant phenotype
  3. C
    less than the number of progeny with recombinant phenotype
  4. D
    could be more or less than then the number of  progeny with recombinant phenotype depending on whether the genes are cis or trans, respectively.
Question 35Single Answer
Two mutant plants, both bearing white flowers were crossed. All F1, plants had red coloured flowers. When an F1 plant was selfed it produced flowers in 9:7 ratio. Based on this information, which one of the following conclusions is correct?
  1. A
    The mutations in the parents do not complement each other
  2. B
    The mutations in the parents are allelic
  3. C
    The mutations in the parents are non-alleic
  4. D
    The mutations in the parents are linked
Question 36Single Answer
Reflex ovulation does NOT occur in-are
  1. A
    cats
  2. B
    rabbits
  3. C
    mink
  4. D
    rats
Question 37Single Answer
Mammillary bodies are present in-
  1. A
    thalamus
  2. B
    epithalamus
  3. C
    hypothalamus
  4. D
    midbrain
Question 38Single Answer
In which one of the body fluids is K+ concentration higher than that of Na+?
  1. A
    Plasma
  2. B
    Perilymph
  3. C
    Endolymph
  4. D
    Cerebrospinal fluid
Question 39Single Answer
Which one of the following is NOT involved with the absorption of iron in the intestine?
  1. A
    Divalent metal transporter
  2. B
    Ferroportin I
  3. C
    Hephaestin
  4. D
    Transferrin
Question 40Single Answer
Which one of the following statements is NOT correct for Casparian strip?
  1. A
    It breaks the continuity of water movement through the apoplast pathway
  2. B
    It is formed in the growing part of the root
  3. C
    It is formed several millimeters or several centimeters behind the root tip
  4. D
    It is a band within the radial cell walls of the endodermis that is impregnated with lignin
Question 41Single Answer
The plant hormone, Gibberellic Acid is generally NOT associated with-
  1. A
    stem elongation
  2. B
    parthenocarpy
  3. C
    Parthenogenesis
  4. D
    malt production
Question 42Single Answer
Which one of the following is the correct of function of JAZ (JASMONATE ZIM-DOMAIN) protein family, a key regulator of Jasmonic Acid (JA) signalling response?
  1. A
    Binds to MYC2 and represses the JA dependent gene
  2. B
    Binds to MYC2 and transcribes JA dependent genes
  3. C
    Acts as receptor of JA signal
  4. D
    Involved in directly inducing JA dependent genes
Question 43Single Answer
Which one of the following is NOT a phenotype of dark-grown seedlings that are etiolated?
  1. A
    Short hypocotyls
  2. B
    An apical hook
  3. C
    Closed cotyledons
  4. D
    Non-photosynthetic proplastids
Question 44Single Answer
In the context of diversity patterns of species which one of the following statements is INCORRECT ?
  1. A
    Alpha diversity is diversity within a single community
  2. B
    Beta diversity is a measure of the change species composition from one communities/ habitat to another.
  3. C
    Alpha diversity is the regional diversity found among range of communities geographical region
  4. D
    Gamma diversity is the regional diversity  found among range of communities/habitats in a geographical region
Question 45Single Answer
A species whose life history strategies allow for  high intrinsic rates of increase (r-strategist) will also exhibit the following EXCEPT
  1. A
    high tolerance for both environmental instability and low quality resources
  2. B
    short period of exponential population growth (r)
  3. C
    reproductive straegy that involves random mating semeparity and little or no parental investment.
  4. D
    survivorship that show density-dependent mortality typically exhibiting Type 1 or 2 survivorship curves.
Question 46Single Answer
Which one of the following statements is true about xylem in plants?
  1. A
    It is characterized by the presence Of tracheary elements responsible for the conduction of water in vascular plants.
  2. B
    It is responsible for the transport of water and characterized by sieve elements like parenchyma cells and sclereids.
  3. C
    It is responsible for the transport of assimilates in the vascular plants and characterized by tracheary elements.
  4. D
    It is responsible for the transport of assimilates in both vascular and non-vascular plants
Question 47Single Answer
Among the following statement, which is the correct one that refers to a Holotype?
  1. A
    Specimens collected from different locations and designated as type specimens by the
  2. B
    A single specimen or illustration upon which name is based and designated as nomenclature type by the author.
  3. C
    Specimens collected from different places and designated as type specimen.
  4. D
    A single specimen designated to serve as nomenclatural type when all of the materials on which the name of the taxon was based is missing.
Question 48Single Answer
Given below are growth equations where dN/dt is defined as.
A.rN/K
B.rN
C.rN[(K-N)/N]
D.πN[(K-N/K]
With reference to the above equations, which one of following statements is correct?
  1. A
    B represents exponential growth and A represents logistic growth.
  2. B
    B represents exponential growth and D represents logistic growth.
  3. C
    B represents zero growth and C represents logistic growth
  4. D
    A represents exponential growth and D represents logistic growth
Question 49Single Answer
Phages are collected from an infected E. coli donor strain of genotype cys+ leu+ thr+ and used to transduce a recipient of genotype cys- leu- thr-. The treated recipient population is plated on a minimal medium supplemented with leucine and threonine. Many colonies grew. Which one of the following combination of genotypes are appropriate for the colonies that grew ?
  1. A
    cys+ leu+ thr+, cys+ leu- thr, cys- leu+ thr-
  2. B
    cys- leu+ thr+, cys+ leu- thr-, cys+ leu+ thr-
  3. C
    cys- leu- thr-, cys- leu- thr+, cys- leu+thr-
  4. D
    cys+ leu- thr-, cys+ leu- thr+, cys+ leu+ thr-
Question 50Single Answer
A researcher exposed Drosophila larvae to 37°C during their growth. One of the adult flies that emerged had a crossveinless phynotype.Crossveinless is a known mutant in Drosophila When this crossveinless fly was crossed to a  known crossveinless mutant fly all the progny had normal phenotype. The observed phynotype can be best explained as an example of.
  1. A
    Conditional mutant
  2. B
    Phenocopy
  3. C
    Penetrance
  4. D
    Pleiotropy
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