Related InterviewSolutions

• 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.
•  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.
• 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
• 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
• 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.
• 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 
• 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
• 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. ___
• 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
•  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