InterviewSolution
Saved Bookmarks
InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Following are microscopic sections of quadriceps muscles from two athletes. The cells are stained to show the activity of myosin ATPase. Mark the most appropriate description from the following. a. P is likely to contain more mitochondria than Q. b. Q is likely to have large stores of glycogen than P. c. P is likely to represent muscle of a high jumper and sprinter. d. Creatine phosphate is the major source of energy in the muscle depicted in Q but not in P. |
|
Answer» Correct answer is a,b,c |
|
| 2. |
Two statements regarding evolution are made below. I. Rates of evolution are typically very slow because natural selection is usually ____P____ selection. II. The plant population growing on high-zinc-soil is able to grow at concentrations which are otherwise lethal to plants of the same species. This is _____Q_____ selection.P and Q refer to : a. directional and disruptive selection respectively. b. stabilizing and directional selection respectively. c. directional selection. d. stabilizing selection. |
|
Answer» c. directional selection. |
|
| 3. |
Which of the following properties of plasmids are central to the evolution of bacteria? i. Plasmids are genetically dispensable for host cells in the absence of a selection pressure. ii. Some plasmids have the ability to get transferred horizontally from one cell to another. iii. Some plasmids permit interaction between bacterial cells of different species. iv. Plasmids are naked DNA molecules incapable of survival outside a living cell. a. i & ii only b. ii & iii only c. i & iii only d. i, ii & iv |
|
Answer» b. ii & iii only |
|
| 4. |
Following are the functinal aspects of stimulation of automomous nervous system. Mark P for parasympathetic and S for sympathetic response against them.Parasympathetic (P) or Srympathetic (S)i. increase peristalsis in gastro intestinal tractii. Constriction of bronchi in lungs iii. Dilation of pupil |
|
Answer» i-P, ii-P, iii-S, iv-S |
|
| 5. |
In order to study the properties of membrane proteins, they are required to be isolated and purified. In one such experiment, two methods were followed to isolate membrane proteins from erythrocytes. I. Varying the pH of the buffer in which the membrane fractions were isolated. The supernatant collected and analysed. Protein 'X' was found. II. Addition of detergents to the membrane preparation. Soluble fractions analysed. Protein 'Y' was found. When proteins X and Y were studied for their structural properties, it was found that polar amino acids predominated (property 1) on the surface of one of them while the non-polar on the other (property 2). Which of the following can be deduced from this? Put tick marks in the appropriate boxes.a. X is likely to be bound to membrane by electrostatic attraction. b. Y is likely to show property. 2. c. X is likely to be the integral membrane protein. d. Y is most likely to be a cytoskeletal protein. e. Protein X is likely to be present in cell exterior (exoplasmic face) and Y in the cyotsolic face. |
|
Answer» a. X is likely to be bound to membrane by electrostatic attraction.True b. Y is likely to show property. 2. True c. X is likely to be the integral membrane protein. False d. Y is most likely to be a cytoskeletal protein. True e. Protein X is likely to be present in cell exterior (exoplasmic face) and Y in the cyotsolic face.False |
|
| 6. |
Which of the following proteins are likely to be active during mitosis? i. Telomerase ii. Primase iii. Topoisomerase iv. Kinesin a. ii, iii & iv only b. iii & iv only c. l, ii & ill only d. only iv |
|
Answer» a. ii, iii & iv only |
|
| 7. |
In an experiment, a researcher incubated plant tissue with a bacterial strain for different time durations followed by heat treatment to specifically kill the bacteria. The plant material was analyzed ten days after each experiment for appearance of disease symptoms. Results of this study, which was done in three replicates and with appropriate controls, are tabulated below.Duration of bacterial Incubation Heat treatment Disease symptom0(minus infection)+NO0(minus infection)-NO12 hours+NO12 hours-Yes24 hours+NO24 hours-Yes48 hours+NO48 hours-Yes72 hours+Yes72 hours-YesWhich of the following statement/s is/are likely explanation/s of the above observations? (i) The bacterium is incapable of causing infection in the absence of heat treatment. (ii) Continuous contact with live bacteria is not essential to cause disease symptoms. (iii) The bacterium undergoes spontaneous mutations to become heat-resistant. (iv) Contact duration of 72 hours with live bacteria is essential to cause disease symptoms.a. ii and iv only b. i, iii and iv only c. ii only d. i and iii only |
|
Answer» b. i, iii and iv only |
|
| 8. |
During blood circulation, the amount of blood reaching every organ will depend on several factors such as total weight of the organ, the type of metabolic function it performs etc. When body is at rest, the percentage of total blood flowing to different organs will vary. State whether each of the following statements is true (T) or false (F).a. At rest, the blood supply to skin in cool weather will be greater than in hot weather. ________ b. Flow of blood (ml/min) per unit gram of tissue will be greater to kidneys than to the brain, at rest. ________ c. At rest, flow of blood (ml/min) to liver tissue will be much greater than heart. ________ d. When a person is at rest, a small percent (< 5%) blood will be found in bronchi. ___ |
|
Answer» a. At rest, the blood supply to skin in cool weather will be greater than in hot weather. False b. Flow of blood (ml/min) per unit gram of tissue will be greater to kidneys than to the brain, at rest. True c. At rest, flow of blood (ml/min) to liver tissue will be much greater than heart. True d. When a person is at rest, a small percent (< 5%) blood will be found in bronchi. True |
|
| 9. |
Diagrams A -D show the external or internal structures of leaves from different groups of plants.Match these diagrams with the plants described by statements I - IV. I. The sexual reproductive structures are formed on an independent non-dominant plant body. II. Plants in this group have leaves with a haploid number of chromosomes. III. Plants in this group are seed-bearing and amongst the earliest evolved extant trees. IV. The mega gametophytes develop within enclosed ovules. a. I-B, II-A, III-D, IV-C b. I-B, II-D, III-C, IV-A c. I-C, II-A, III-B, IV-D d. I-D, II-B, III-A, IV-C |
|
Answer» a. I-B, II-A, III-D, IV-C |
|
| 10. |
Apoptosis is programmed cell death characterized by the formation of apoptotic bodies whereas necrosis is characterized by bursting of cells. Which of the following condition/s lead/s to necrosis? i. Gaps and nicks formed in DNA during replication cannot be repaired. ii. Developing neurons fail to make synapses with neighbouring cells. iii. Heart muscle cells damaged by oxygen depletion followed by cardiac infarction. a. i and ii b. ii and iii c. i only d. iii only |
|
Answer» Correct answer is d. iii only |
|
| 11. |
Which one of the following plant traits is NOT associated with colonization on land from aquatic habitat? a. Presence of apical meristems. b. Absence of alternation of generations. c. Formation of multicellular, dependent embryos. d. Production of gametes within multicellular organs. |
|
Answer» d. Production of gametes within multicellular organs. |
|
| 12. |
Concentrations of cations & anions present in intracellular & extracellular fluids of human body are depicted in the graph.P,Q,R and S respectively are : a. K+ ,Na+ , Cl– and organic anions b. Proteins, bicarbonates, K+ and Na+ c. Mg++ , proteins, bicarbonates and Na+ d. Ca++ , lactate, K+ and Cl- |
|
Answer» b. Proteins, bicarbonates, K+ and Na+ |
|
| 13. |
Comparison of related sequences from different species can give clues to evolutionary relationships among proteins. A phylogenetic tree representing relationship between tubulin sequences is depicted below.Filled circles indicate common ancestors. Mark the correct statement about the likely evolutionary mechanism.a. Tubulin gene most likely diverged into α and β forms after speciation. b. A gene duplication event led to two identical copies of the gene within each species and then the sequences diverged further. c. A gene duplication event occurred first followed by sequence divergence. Each sequence diverged further during speciation. d. Earliest eukaryotic cell most likely contained two tubulin genes which further diverged from each other during the course of speciation. |
|
Answer» d. Earliest eukaryotic cell most likely contained two tubulin genes which further diverged from each other during the course of speciation. |
|
| 14. |
Three closely related species of genus Clusia are found in moist forests, dry deciduous forests and dry rocky coast of Trinidad island. In order to study their physiological response, they were raised under identical conditions in growth chambers. For one of these species, measurements were made under well-watered conditions (0 day) and after 5 days and 10 days without further irrigation. The results are shown : Graph with hollow circles is response of young leaves while solid line indicates mature leaves of the same plant.State whether each of the following statements is true (T) or false (F). a. Young leaves are unable to fix CO2 in the night of 0 day while the mature leaves followed CAM pathway. ________ b. Peak indicated as "P" in the graph is result of activation of "RUBISOCO" enzyme. ________ c. Young leaves are utilizing C3 pathway in the beginning of the experiment and then progressively assimilate CO2 by CAM pathway. ________ d. The response shown in the graph is most likely of a species that grows in moist forest. ________ |
|
Answer» a. Young leaves are unable to fix CO2 in the night of 0 day while the mature leaves followed CAM pathway. True b. Peak indicated as "P" in the graph is result of activation of "RUBISOCO" enzyme. False c. Young leaves are utilizing C3 pathway in the beginning of the experiment and then progressively assimilate CO2 by CAM pathway. True d. The response shown in the graph is most likely of a species that grows in moist forest. False |
|
| 15. |
Norwegian scientists performed atcross-fostering experiment.They removed just born greattit chicks and placed them in the nests of blue-**** and vice versa. These chicks were observed till their adulthood and their pair-making behaviour was noted. The graph shows pairing success of these crossfostered birds along with non-fostered birds.State whether each of the following statements is true (T) or false (F). a. The experimental results show imprinting behavior in the two bird species which is an example of a learned behavior. ___ b. Since one species could successfully find mates in spite of being reared by different species shows that courtship behavior is controlled only by genes and not affected by the environment. ___ c. Since both the species show a very small percent of mates of species that was their foster parents, shows that this behavior is genetically acquired. ___ d. The ability of the two species to consider the foster species as their own varied. This indicates that this behavior is genetically influenced. ___ e. The percent pairing success for blue-**** shows that foster parenting has no effect on the courtship behavior. ___ |
|
Answer» a. The experimental results show imprinting behavior in the two bird species which is an example of a learned behavior. True b. Since one species could successfully find mates in spite of being reared by different species shows that courtship behavior is controlled only by genes and not affected by the environment. False c. Since both the species show a very small percent of mates of species that was their foster parents, shows that this behavior is genetically acquired.False d. The ability of the two species to consider the foster species as their own varied. This indicates that this behavior is genetically influenced. True e. The percent pairing success for blue-**** shows that foster parenting has no effect on the courtship behavior. False |
|
| 16. |
The diagram depicts the spatial distribution of two plant species, Acacia tortil/is (a tree) and Euclea divinorum (a shrub) inhabiting the Savannah grasslands in Southern Africa. Based on it, state whether each of the following statements is true (T) or false (F)a. Acacia tortillas shows a uniform distribution _____ b. Euclea divinorum shows a clumped distribution _____ c. The clumps of Eculea divinorum show a uniform distribution. _____ d. A. tortillas and E. divinorum form the dominant vegetation in the landscape. _____ |
|
Answer» a. Acacia tortillas shows a uniform distribution. True b. Euclea divinorum shows a clumped distribution True c. The clumps of Eculea divinorum show a uniform distribution.False d. A. tortillas and E. divinorum form the dominant vegetation in the landscape.False |
|
| 17. |
Each animal taxon has certain unique features. Match the following classes of animals with their unique features. TexaFeaturesi. Arachnidaa. Torsion and detorsionii. Turbellariab. Intracellular as well as extracellular digestioniii. Crustaceac. Four pairs of walking legsiv. Gastropodad. Flame cells for excretionv. Coelenteratae. Presence of antennae, anntenules and pleopodsvi. Ophiuroideaf. Direct respirationg. Metameric segmentationh. Presence of ambulacral areasChoose the appropriate feature for each taxon and fill in the blanks with the corresponding alphabet:i.ii.iii.iv.v.vi. |
||||||||||||
Answer»
|
|||||||||||||
| 18. |
For organisms, whose genomes are completely sequenced, the variation between the genomes can be measured from the temperature at which single-stranded DNA molecules anneal to form a double helix.P represents a melting curve when both DNA strands were taken from a mocking bird. Q represents a melting curve when one DNA strand was from a mocking bird and another from starling. I to IV represent melting curves obtained when DNA strands of different bird species shown in the cladogram were paired.State whether the following statements are true (T) or false (F).a. Curve I is likely to represent DNA duplex formed by one strand from a mocking bird and another from a thrasher.____ b. Common starlings, mynahs and catbirds form a monophyletic clade where the most recent common ancestor evolved around 20 mya.____ c. Curves II and III likely to represent hybrids between DNA of mocking bird with family Sylvoidea and family Passeroidea respectively.____ d. The greater the curve to the left of P, greater is the complementarity between the sequences.____ |
|
Answer» a. Curve I is likely to represent DNA duplex formed by one strand from a mocking bird and another from a thrasher.True b. Common starlings, mynahs and catbirds form a monophyletic clade where the most recent common ancestor evolved around 20 mya.True c. Curves II and III likely to represent hybrids between DNA of mocking bird with family Sylvoidea and family Passeroidea respectively.True d. The greater the curve to the left of P, greater is the complementarity between the sequences.False |
|
| 19. |
Synanthropic species lives near and benefit from the association with humans and the habitats that humans create around them. Changes in bird community structure and composition along a wilderness to urbanized landscape gradient are provided below.Based on the information provided in the graph, state whether each of the following statements is true (T) or false (F). a. The graph indicates a increased predation pressure on native bird species in urban ecosystem.___ b. The increase in total bird abundance is indicative of greater food availability in urban ecosystem as compared to wildland.___ c. Habitat fragmentation, forest destruction has resulted in reduced number of species in urban region.___ d. Bird pecies that cannot exist in unpredictable or resource poor environments are likely to flourish in urban ecosystem.___ e. Dominance of adopted species over resource patches in urban ecosystem can outcompete less fit native species evenness in urban ecosystem.___ f. Urbanization creates a novel ecosystem which attracts and stabilizes a large number of bird species from nearby ecosystems.__ |
|
Answer» a. The graph indicates a increased predation pressure on native bird species in urban ecosystem.True b. The increase in total bird abundance is indicative of greater food availability in urban ecosystem as compared to wildland.True c. Habitat fragmentation, forest destruction has resulted in reduced number of species in urban region.True d. Bird pecies that cannot exist in unpredictable or resource poor environments are likely to flourish in urban ecosystem.True e. Dominance of adopted species over resource patches in urban ecosystem can outcompete less fit native species evenness in urban ecosystem.True f. Urbanization creates a novel ecosystem which attracts and stabilizes a large number of bird species from nearby ecosystems.False |
|
| 20. |
Batesian mimicry is a type of mimicry in which an edible animal is protected by its resemblance to one avoided by the predators. It typically includes three elements: I. Predator, II. Species which is dangerous or unpalatable to the predator- termed as "model" and III. Palatable species termed as "mimic". A few statements about Batesian mimicry are given. Indicate whether each of them is true (T) or false (F) a. Batesian mimicry can be stably maintained only if the harm caused to the predator by eating a model overweighs the benefit of eating a mimic. ________ b. Batesian mimicry can be stably maintained if the mimics become more abundant than the models. ____ c. Young predator with first experience with mimic is likely to destabilize the evolution of Batesian mimicry in a population. ____ d. In Batesian mimicry, there is always a directional selection that causes model species to evolve away from mimic. _____ |
|
Answer» a. Batesian mimicry can be stably maintained only if the harm caused to the predator by eating a model overweighs the benefit of eating a mimic. True b. Batesian mimicry can be stably maintained if the mimics become more abundant than the models.False c. Young predator with first experience with mimic is likely to destabilize the evolution of Batesian mimicry in a population. True d. In Batesian mimicry, there is always a directional selection that causes model species to evolve away from mimic.False |
|