Day: July 15, 2023

Q 1. Animal cells are connected by _______ Desmosome Cell wall Cell Membrane Plasmodesmata Answer – 4, PlasmodesmataExplanation: Plasmodesmata are thin strands of cytoplasm that connect the cytoplasm of adjacent cells, allowing for the exchange of materials such as proteins and ions. Animal cells are connected by plasmodesmata, while plant cells are connected by desmosomes and a cell wall surrounding them.   Q 2. The rRNA is synthesized by _________ Golgi body Nucleus Nucleolus Cytoplasm Answer – 3, NucleolusExplanation: The rRNA is synthesized by the Nucleolus. The Nucleolus is a specialized structure found in the nucleus of eukaryotic cells and is the site for

Q1. The process of appearance of recombination nodules occurs at which sub-stage of prophase I in meiosis? Diakinesis Zygotene Pachytene Diplotene Answer – 3, PachyteneExplanation: The process of the appearance of recombination nodules occurs during the Pachytene sub-stage of prophase I in meiosis. It is important to note that this is a very complex stage of meiosis and requires a thorough understanding to answer this question accurately.   Q2. Among eukaryotes, replication of DNA takes place in G2 Phase M phase S phase G1 phase Answer – 3, S phaseExplanation: Replication of DNA takes place in the S phase of the cell cycle. The

Q 1. An attribute found in plants but not animals is Metabolism Sexual reproduction Autotrophy Asexual reproduction Answer: 3, AutotrophyExplanation: Autotrophy is an attribute found in plants but not animals. Autotrophs are organisms that make their food using a process known as photosynthesis, and they do not need any other organism to survive. On the other hand, animals rely on obtaining energy from their environment or from autotrophs, which can be through ingestion, absorption, or photosynthesis.   Q 2. Compared to genus, which of the following is less general in characters? Family Species pision Class Answer: 2, speciesExplanation: Species would be less general in

Q1. What does the term “cellular respiration” refer to? Water decomposition, The breakdown of air to release energy, Food items decomposing to produce energy, Energy is released as soil breaks down. Answer- Option (3) is correct.Explanation: Cellular respiration is the process by which food components are broken down inside of a cell to produce energy, which is then captured to create ATP. Eukaryotes, which include all multicellular creatures and some single-celled species, generate energy through aerobic respiration. The most potent electron acceptor found in nature, oxygen, is used in aerobic respiration. Eukaryotes’ complex life functions and busy lives are made possible by

Q 1. Which of the following developed for the first time in Annelids? Cephalization Development of a true coelom Metameric segmentation Both 2 and 3 Answer – 4, both 2 & 3Explanation: Cephalization, which is the concentration of nerve tissue at the anterior end of an organism, and metameric segmentation, which is the pision of the body into segments, are two significant evolutionary developments that first developed in Annelids. Animal Kingdom’s courses will teach you more about these biological phenomena and their influence on modern species.   Q 2. What is the most crucial reason for the immense success of arthropods? Chitinous

Q 1. As a result of photorespiration, glycolate is converted into serine and carbon dioxide in the following ways: Mitochondria Chloroplasts Vacuoles Peroxisomes Answer: d, PeroxisomesExplanation: Photorespiration involves converting glycolate into serine and carbon dioxide in peroxisomes. Plants undergo photorespiration through the oxygenation of ribulose-1,5-bisphosphate (RuBP) instead of the desired carboxylation reaction, which is the outcome of photorespiration. Consequently, glycolate is formed, which needs to be salvaged to prevent carbon and energy loss. In the peroxisomes, glycolate is metabolized through a series of reactions known as the glycolate pathway. This pathway involves several enzymatic steps, leading to the conversion of glycolate into

Q1. In humans, what is true about RBCs? They transport about 80% of oxygen, and the remaining 20% is dissolved in blood plasma. They transport 99.5% of oxygen About 20-25% of CO2 is carried by them CO2 is not held by them Answer – 2, They transport 99.5% of oxygenExplanation: Red blood cells (RBCs) transport 99.5% of Oxygen and carry about 20-25% of Carbon Dioxide (CO2). The remaining 0.5% of oxygen is transported in the dissolved state in blood plasma, while the rest of the CO2 is exhaled during respiration.   Q2. Pick the incorrect statement A bird’s ability to breathe efficiently

Q1. The release of pancreatic juice is stimulated by enterokinase cholecystokinin secretin Both 2 and 3 Answer – 4, Both 2 and 3Explanation: Both 2 and 3 are correct. Enterokinase, or enteropeptidase, is an enzyme in the small intestine responsible for activating trypsin from pancreatic juice. Cholecystokinin (CCK) is a hormone produced in the small intestine that stimulates the release of enzymes and bile from the pancreas and gall bladder. Secretin is another hormone in the small intestine that stimulates the pancreas to release watery juice-containing enzymes called pancreatic juice.   Q2. In vertebrates, lacteals are found in ileum ischium esophagus Ear

Q1. Nitrogenous waste is excreted in the form of pellets or paste by Pavo Ornithorhynchus Salamandra Hippocampus Answer – 1, PavoExplanation: Nitrogenous waste is excreted as pellets or paste by these animals. This excretion process, known as “uricotelism”, allows the organism to conserve water and eliminate nitrogenous waste products as a paste or a dry powder.   Q2. Which one of the following hormones reduces blood pressure? Antidiuretic hormone Atrial Natriuretic factor Aldosterone Angiotensin-ll Answer – 2, Atrial Natriuretic factorExplanation: The hormone responsible for reducing blood pressure is the Atrial Natriuretic Factor (ANF), released from the walls of the atria in response to increased

Q 1. Among the glands mentioned below, which of the following is not involved in the process of digestion? Stomach Salivary Glands Adrenal Gland Liver Answer – Option (c) is correctExplanation: The Stomach is the site for digestion and secreted many enzymes that break down large macromolecules. The liver also contributes to digestion by releasing bile juice and other digestive enzymes. Salivary glands release saliva which breaks down carbohydrates in the food. Adrenal glands are not directly associated with digestion but the hormones secreted by them might regulate the metabolism of food.   Q 2. Which of the following statements correctly explains

Q 1. Which of the following organs serve as the primary reproductive organ in human males and females respectively? Testis in males and Ureter in females. Urethra in males and Ovary in females. Testis in males and Ovary in females. None of these. Answer- Option (3) is correct.Explanation: The primary reproductive organ of a human male is the testis because it produces and releases the male gametes or sperm. Similarly, in human females, the ovary produces and releases the female gametes or ova. When the two gametes(sperm and egg) fertilize, reproduction proceeds further and a new organism can be produced. The ureter

Q 1. Which of the following assertions regarding SMOG is true? SMOG originates from fog. SMOG is formed from smoke. SMOG originates from water vapor. SMOG originates through the combination of fog and smoke. Answer- Option (1) is correct.Explanation: Neither fog nor smoke alone can result in smog. As the name suggests smoke is a combination of smoke and fog. When smoke released from burning fossil fuels, wood, etc combines with fog in the atmosphere, it results in smog which reduces visibility and makes breathing difficult. Water vapor directly does not result in smog formation.   Q 2. The main contributors of

Q 1. Because of the presence of _________, spider blood typically has a blue color. Hemerythrin Hemoglobin Hemocyanin none of the aforementioned. Answer- Option (3) is correct. Explanation: Haemoglobin is found in humans and other higher animals and it is red in color. Hemeeyrhtin is used for oxygen transport in marine invertebrates and it is colorless in the absence of oxygen but turns violet-pink when it is attached to oxygen. Hemocyanin is seen in arthropods, particularly spiders and it has a typical blur appearance which makes the spider’s blood blue.   Q 2. Which of the following organisms exhibits diploblastic organization? Hydra,

Q 1. If a colorblind woman marries an average-visioned man, their sons will be Three-fourths colorblind and one-fourth normal One-half colorblind and one-half normal All normal visioned All colorblind Answer: a, Three-fourths colorblind and one-fourth normalExplanation: Color blindness is an X-linked recessive trait passed down from fathers to their sons. If both father and mother are carriers of the genetic trait (neither being colorblind), then there is a three in four chance that any son born to them will be colorblind.   Q 2. Which of the following is the significance of dominance? organisms with dominant genes have stronger vitality the dominant

Q 1. Which of the options listed below is not the purpose of a sequence comparison? To identify any shared patterns between the two sequences. Investigating the physical characteristics of molecules To investigate evolutionary links To spot conservation trends Answer: Option(2) is correct.Explanation: A comparison is necessary to determine if it is likely that two sequences originated from the same sequence. Sequence comparison is also used to determine whether sequences from the database are comparable to the sequence in question.   Q 2. In the mutation process of a genetic algorithm, _______ no changes are made to the sequence changes are made