चिकित्सा शिक्षा आयोग (CEE) बीडीएस प्रवेश परीक्षा तयारी
चिकित्सा शिक्षा आयोग (CEE) – बीडीएस प्रवेश परीक्षा
CEE – BDS Entrance · Medical Education Commission – CEE
२,०३९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
MBBS/BDS/Nursing प्रवेश: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
-
Which of the following best describes the basic structure of an antibody (immunoglobulin)?
सही उत्तर: ख) A large, intricately folded glycoprotein composed of heavy and light chains
Antibodies are glycoproteins formed by the combining of heavy and light polypeptide chains folded into a specific three-dimensional structure. This precise folding is crucial for their antigen-binding capabilities. The other options describe fundamentally different biomolecules.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A researcher studying the circulatory system of a frog observes that the heart has three chambers – two atria and one ventricle. What does this anatomical feature indicate about the frog’s evolutionary history?
सही उत्तर: ग) The frog represents an intermediate stage in vertebrate evolution, transitioning from aquatic to terrestrial life
A three-chambered heart (two atria and one ventricle) signifies that the frog is transitioning from an exclusively aquatic lifestyle towards one adapted for land. While it does facilitate some oxygenation, it's not as efficient as a fully separated four-chambered heart.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The rhythmic contraction of the heart in a frog is primarily controlled by:
सही उत्तर: ख) Intrinsic cardiac muscle fibres and hormones
Frogs, like other amphibians, possess an intrinsic rhythm within their cardiac muscle allowing the heart to beat without direct nervous control. The other options describe external regulatory mechanisms or structures not involved in amphibian heart function.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A black body absorbs all incident radiation at a given frequency. If the wavelength of maximum absorption shifts from 400 nm to 200 nm, what is the factor by which the total energy radiated increases?
सही उत्तर: घ) 16
According to Wien's displacement law, the wavelength at which a black body radiates most strongly is inversely proportional to its absolute temperature (λmax * T = constant). When λ shifts from 400 nm to 200 nm, it halves. Therefore, the temperature must have doubled (T2 = 2 * T1) according to Wien's Law. The total energy radiated is proportional to temperature to the fourth power (E ∝ T⁴). So, if the temperature doubles, the energy increases by a factor of 2³ = 8.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A battery provides a current of 3 A through a 4 Ω resistor and 2 A through a 10 Ω resistor. What is the internal resistance (in ohms) of the battery?
सही उत्तर: ख) 1.6
Using Ohm's Law (V = IR) for both resistors, we can calculate the voltage across each: V_4Ω = 3 * 4 = 12V and V_10Ω = 2 * 10 = 20V. The total voltage is 12 + 20 = 32V. Since the battery provides this voltage, we can use the equation I = (V/R) to find its internal resistance: R_internal = V/I = 32 / 3 = 10.67 ohms, or approximately 0.8 ohm when rounded to one decimal place. Options 2, 3 and 4 are incorrect calculations.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A water pump lifts 800 kg of water per minute to a height of 15 meters. What is the minimum power (in Watts) required by the pump? (Take g = 9.8 m/s²)
सही उत्तर: घ) 1800
The power of the pump is given by P = mgh, where m is the mass (800 kg), g is the acceleration due to gravity (9.8 m/s²), and h is the height (15 m). Calculating this gives P = 800 * 9.8 * 15 = 1600 Watts. The tempting answers are incorrect calculations of power using different values for mass or height.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A thermometer reads 5°C when placed in ice and 95°C when placed in boiling water. If the thermometer reads 67°C, what is the actual temperature?
सही उत्तर: ख) 67°C
The problem describes a linear relationship between the thermometer reading and the actual temperature. The thermometer's scale is calibrated proportionally to the temperature. The correct temperature corresponds directly to the 67°C reading on the faulty thermometer. Options 2, 3, and 4 are plausible because they represent other possible temperature readings, but the given scale of the thermometer determines the precise answer.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Which of the following processes represents the primary pathway for the synthesis of complex organic molecules from inorganic sources within a plant? (A) Transpiration. (B) Respiration. (C) Photosynthesis. (D) Germination.
सही उत्तर: ग) (C) Photosynthesis.
Option (C) is correct – photosynthesis uses light energy to convert carbon dioxide and water into glucose and oxygen. This is the fundamental process by which plants create their own food. The other options describe different physiological processes like water loss, cellular respiration, and seed sprouting respectively.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The phenomenon of apical dominance, where a primary shoot develops from an axillary bud, is primarily controlled by which plant hormone? (A) Ethylene. (B) Gibberellin. (C) Auxin. (D) Abscisic acid.
सही उत्तर: ग) (C) Auxin.
Option (C) is correct. Auxin, particularly indole-3-acetic acid (IAA), is the major hormone responsible for apical dominance. High concentrations of auxin produced by the shoot apex inhibit the growth of lateral buds, promoting the development of the main stem. The other hormones have distinct roles in plant physiology.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Which of the following best describes the function of CAM photosynthesis? (A) It occurs during daylight hours with high rates of carbon dioxide uptake. (B) It involves opening stomata throughout the day to maximize photosynthetic activity. (C) It allows plants to minimize water loss by fixing CO2 at night and using it for photosynthesis during the day. (D) It relies solely on the absorption of light energy for the initial steps of carbon fixation.
सही उत्तर: ग) (C) It allows plants to minimize water loss by fixing CO2 at night and using it for photosynthesis during the day.
Option (C) accurately describes CAM photosynthesis – a strategy employed by succulents and other plants to reduce water loss. They open their stomata at night to absorb CO2, storing it until daylight when they use it for photosynthesis. This avoids the direct exposure of stomata to sunlight and evaporation during hot, dry conditions.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
AI ले गल्ती गर्न सक्छ। महत्वपूर्ण कुरा आधिकारिक स्रोतमा जाँच्नुहोस्।