Biological Science - 2014 Past Year Paper - IIT JAM MCQ
30 Questions MCQ Test IIT JAM Past Year Papers and Model Test Paper (All Branches) - Biological Science - 2014 Past Year Paper
Transposons are distributed through the human genome and constitute about 45% of the genome.Retrotransposons are
Several enzymes are involved in DNA repair pathways. Which one of the following enzymes is also referred to as a suicidal enzyme?
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In the lactose operon, the lac repressor binds to the operator and does NOT allow RNA polymerase to bind to the promotor. Allolactose reduces the affinity of the repressor for the lac operator by binding and changing its conformation. Thus, addition of lactose or a synthetic inducer stimulates the transcription of the lac operon structural genes.
Synthetic inducers are called gratuitous inducers because
Group I lists certain plant fungal diseases. Group II lists the causative agents. Match the diseases with the corresponding causative agents.
Some mushrooms are poisonous and are popularly called “death caps” or “destroying angles”.Which one of the following is the deadliest mushroom?
Flower is a modified shoot or a branch. Which one of the following DOES NOT provide evidence in support of the above statement?
A few bacterial general have cell walls composed of pseudomurein. These polymeric structures resemble eubacterial peptidoglycan but are very different in composition. Which one of the following possesses such structures in its cell wall?
Anoxygenic photosynthetic bacteria possess bacteriochlorophyll which absorbs light in the
Which one of the following statements on ‘cro repressor’ and ‘immunity repressor’ of lambda phage is NOT correct?
Following uncoating in the cytoplasm, parental (+)- strand RNA of poliovirus is used as template for the synthesis of the polymerase that catalyzes the formation of the (–)-strand RNA. This enzyme is called
Viriods are agents of infections diseases. Which one of the following statements is NOT correct?
Each of the four options given below contains the name of an antibiotic, an organism which produces an antibiotic and a possible mode of action. Which option contains the correct combination?
How many time can a 6 kb fragment be present in 3.9 micrograms of DNA containing 6 billion bases? Assume the MW of one bp to be 650 Da.
Numerous bacteria are present in the human intestinal tract. Group I lists bacteria and Group II lists their usual location. Match the bacteria with their location.
Charles Darwin’s theory about evolution by natural selection was influenced by the works of
Which one of the following sequence is logically INCORRECT?
Biological nitrogen fixation by free- living and symbiotic microorganisms refers to the enzymatic conversion of
The following figure represents population growth in two species.
Which one of the following options is consistent with this graph?
Darwinian theory of evolution by natural selection can explain the
C3 photosynthesis involves the conversion of atmospheric carbon dioxide to 3- carbon phosphoglycerate. Likewise, C4 photosynthesis converts carbon dioxide to 4- carbon oxaloacetate.
The C4 pathway
Consider the following anatomical features:
All chordates are characterized by the presence of
In which of the following are the plant structures correctly matched with their edible parts?
When different species interact, they may exert selective pressures on each other, Below, different types of species interactions are matched with expected evolutionary responses:
P. Competition : NO selection on either competitor
Q. Competition : selection towards decreased competitive effects
R. Predation : selection towards enhanced prey defense
S. Predation : selection on predator’s traits that counter improved prey defense
T. Commensalism : NO selection on either the commensal or the host
Which pairs are correctly matched?
The term “biodiversity hotspot” refers to which of the following?
P. Hot and humid regions of the world
Q. Areas with high species richness
R. Areas with high levels of endemism
S. Areas where endangered species congregate in summers
T. Areas where warm- blooded species are more common that cold- blooded species
In a population at Hardy- Weinberg equilibrium, the frequency of a recessive allele that causes a genetic disorder is 0.3. What percentage of the population is expected to suffer from this condition?
Number of chromosomes in Down’s syndrome is
Double fertilization in angiosperms leads to the production of
Many disease- causing microbes are becoming resistant to drugs. This could be an example of
Deserts are arid ecosystems that occur near latitudes of 30 degrees North and South. Which one of the following can explain this geographic pattern?
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29 docs|48 tests
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29 docs|48 tests
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Important Questions for Biological Science - 2014 Past Year Paper
Biological Science - 2014 Past Year Paper MCQs with Answers
Online Tests for Biological Science - 2014 Past Year Paper IIT JAM Past Year Papers and Model Test Paper (All Branches)
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