GK Quiz on Science: Biology Questions & Answers Set – 35| GK Infopedia

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[1] Aquatic animal with the most developed intelligence is -
A. Shark
B. Whale
C. Flying fish
D. Sea horse
Ans: Shark
Explanation : In terms of brain shape, the shark brain differs a lot from that of mammals and birds. However, in proportion to the body size shark brains usually are similar sized or bigger than those of most mammals and birds, and while arranged in a different way it seems to share the same level of mental capacity, Some shark species seem to be as intelligent as mammals such as dogs, which is really impressive for a non-tetrapod.

[2] The blood vessel which carries oxygenated blood to the liver is -
A. Coronary Artery
B. PulmonawArtety
C. Carotid Artery
D. Hepatic Artery
Ans: Hepatic Artery
Explanation : In anatomy, the common hepatic artery is a short blood vessel that supplies oxygenated blood to the liver, pylorus (a part of the stomach), duodenum (a part of the small intestine) and pancreas.

[3] Bile is stored in the -
A. Gall - bladder
B. Duodenum
C. Liver
D. Spleen
Ans: Gall - bladder
Explanation : Bile is a digestive juice that is a greenish-yellow liquid produced by the liver and stored in the gallbladder. Upon eating it is discharged into the duodenum.

[4] The saliva secreted in the mouth digests -
A. Proteins
B. Starch
C. Fats
D. Vitamins
Ans: Starch
Explanation : The enzymes found in saliva are essential in beginning the process of digestion of dietary starches and fats. These enzymes also play a role in breaking down food particles entrapped within dental crevices, protecting teeth from bacterial decay.

[5] Which of the following animals has a clitellum?
A. Millipede
B. Centipede
C. Earthworm
D. Ringworm
Ans: Earthworm
Explanation : The clitellum is a thickened glandular and non-segmented section of the body wall near the head in earthworms and leeches, that secretes a viscid sac in which eggs are stored. It is located near the anterior end of the body, between the fourteenth and seventeenth segments.

[6] The number of chromosomes present in the somatic cell of the human cell is -
A. 23
B. 44
C. 46
D. 92
Ans: 46
Explanation : Human cells have 23 pairs of chromosomes (22 pairs of autosomes and one pair of sex chromosomes), giving a total of 46 per cell.

[7] Ecology deals with:
A. Birds
B. Cell formation
C. Relation between organisms and their environment
D. Tissues
Ans: Relation between organisms and their environment
Explanation : Ecology is the branch of biology which studies the interactions among organisms and their environment.

[8] What is the total number of bones that are present in human body?
A. 309
B. 405
C. 103
D. 206
Ans: 206
Explanation : The human skeleton is the internal framework of the body. It is composed of around 270 bones at birth this total decrease to around 206 bones by adulthood after some bones get fused together.

[9] IUCN categorized major threatened species under :
A. seven classes
B. nine classes
C. six classes
D. Eight classes
Ans: nine classes
Explanation : The IUCN Red List Categories define the extinction risk of species assessed. Nine categories extend from NE (Not Evaluated) to EX (Extinct). Critically Endangered (CR), Endangered (EN) and Vulnerable (VU) species are considered to be threatened with extinction.

[10] Minamata disease was caused by:
A. Mercury
B. Lead
C. Cadmium
D. Zinc
Ans: Mercury
Explanation : Minamata disease is a neurological syndrome caused by severe mercury poisoning. Symptoms include ataxia, numbness in the hands and feet, general muscle weakness, narrowing of the field of vision and damage to hearing and speech. It was first discovered in Minamata city in Kumamoto prefecture, Japan, in 1956.

[11] Chromosomes are made up of -
A. DNA
B. Protein
C. DNA and Protein
D. RNA
Ans: DNA and Protein
Explanation : The chromatin contains DNA (Deoxy-ribo nucleic acid), RNA (Ribo Nucleic acid) and proteins. The nucleus contains some rod shaped structures in a cell that contains the hereditary information. They are called chromosome. They are formed when the chromatin condenses together when the cell is about to divide.

[12] Which one of the following is an insectivorous plant?
A. Passion flower plant
B. Pitcher plant
C. Night queen
D. Flame of the forest
Ans: Pitcher plant
Explanation : Pitcher plants can get pretty big, some get big enough to eat mice, rats, small animals, and yes, frogs. Most carnivorous plants are not dangerous to humans, but there are are rumors of large species of Nepenthes accidentally eating mice or frogs.

[13] The chemical which is used in art and craft and can cause anemia and leukemia is -
A. Benzene
B. Dioxine
C. Phthalate
D. Aldrin
Ans: Benzene
Explanation : Benzene is an organic chemical compound sometimes known as benzol which is carcinogenic. Substantial quantities of epidemiologic, clinical, and laboratory data link benzene to aplastic anemia, acute leukemia, and bone marrow abnormalities. One of its forms, Ethylbenzene, is used in Paints (Arts and Craft and Interior/Exterior Building)

[14] Total number of muscles present in our body is -
A. 565
B. 656
C. 665
D. 556
Ans: 656
Explanation : The number of muscles in the human body varies from about 656 to 850 (sometimes from 639 to around 800). An exact number is difficult to define. The difficulty lies partly in the fact that different sources group the muscles differently and partly in that some muscles, such as palmaris longus, are not always present.

[15] Biodegradable wastes can usually be converted into useful substances with the help of:
A. nuclear proteins
B. radio-active substances
C. viruses
D. bacteria
Ans: bacteria
Explanation : Biodegradable waste includes any organic matter in waste which can be broken down into carbon dioxide, water, methane or simple organic molecules by micro-organisms such as bacteria. Biodegradable waste can be used for composting or a resource for heat, electricity and fuel by means of incineration or anaerobic digestion.

[16] An ant can see the objects all around it due to the presence of -
A. Eyes over the head
B. Well developed eyes
C. Compound eyes
D. Simple eyes
Ans: Compound eyes
Explanation : Compound eyes are found among the arthropods and are composed of many simple facets which, depending on the details of anatomy, may give either a single pixelated image or multiple images, per eye. Each sensor has its own lens and photosensitive cell(s). Compound eyes are very sensitive to motion.

[17] Which one of the following plant is used to treat blood pressure?
A. Sarpagandha
B. Neem
C. Babool
D. Tulsi
Ans: Sarpagandha
Explanation : Rauwolfia serpentina (Sarpagandha) is an important herb used in Ayurvedic and folk medicine since ages, especially for the treatment of high blood pressure and psychiatric conditions. It is also known as Indian Snakeroot and Devil-pepper. The roots, and the leaves of this plant are all used as medicines.

[18] BCG vaccination is given at the age of -
A. 2-3 years
B. 10 years
C. Newborn
D. Within 15 days
Ans: Within 15 days
Explanation : Bacillus Calmette Guerin is a vaccine against tuberculosis. BCG vaccine can be implemented after the birth intradermally within 15 days.

[19] The Rotavirus vaccine ROTOVAC developed by Indian scientists cures which disease?
A. Diarrohea
B. Cancer
C. Diabetes
D. Arthritis
Ans: Diarrohea
Explanation : Rotavirus vaccine is a vaccine used to protect against rotavirus infections, which are the leading cause of severe diarrhea among young children.

[20] Which base in place of thymine is present in RNA?
A. Adenine
B. Guanine
C. Uracil
D. Cytosine
Ans: Uracil
Explanation : DNA (Deoxyribonucleic acid) contains 2-cleoxy-ribose sugar. It contains cytosine and thymine as pyrimidine bases and guanine and adenine as purine bases. RNA (Ribonucleic acid) contains ribose sugar. It contains cytosine and uracil as pyrimidine bases and guanine and adenine as purine bases.

[21] Pick out the correct match:
A. Fleshy foods-Calcium and Protein
B. Fish - Starch and Vitamin
C. Milk - Fibre and Minerals
D. Egg yolk - Protein and Fat
Ans: Egg yolk - Protein and Fat
Explanation : An egg yolk is a part of an egg which feeds the developing embryo. As a food, yolks are a major source of vitamins and minerals. They contain all of the egg's fat and cholesterol, and about one-half of the protein.

[22] Respiration is regarded as a -
A. Synthetic Process
B. Catabolic Process
C. Anabolic Process
D. Reduction Process
Ans: Catabolic Process
Explanation : Cellular respiration is a catabolic process because it is breaking down glucose to eventually transfer energy into its usable form in ATP. An anabolic process builds things up, photosynthesis is a version of this and the metabolic opposite of cellular respiration.

[23] The structure which helps in the nutrition of the Embryo is -
A. Yolk sac
B. Amniotic membrane
C. Crypts
D. Placenta
Ans: Yolk sac
Explanation : The yolk sac is a membranous sac attached to an embryo, providing early nourishment. It functions as the developmental circulatory system of the human embryo, before internal circulation begins. It carries out transfer of nutrients in weeks 2 and 3 when the uteroplacental circulation is established

[24] Which one of the following parts of the human brain is the regulating centre for swallowing and vomiting?
A. Cerebellum
B. Cerebrum
C. Medulla Oblongata
D. Pons
Ans: Medulla Oblongata
Explanation : Medulla Oblongata is that part of the brain which regulates basic functions. It regulates vomiting, hiccupping, swallowing, coughing, sneezing, etc.

[25] Which one of the following animals is devoid of lateral line sense organ?
A. Labeo
B. Catla
C. Sea horse
D. Magur
Ans: Sea horse
Explanation : The lateral line is a system of sense organs found in aquatic vertebrates, chiefly fish, used to detect movement and vibration in the surrounding water. Sea Horses do not have such organ.



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