General Science Questions Practice Question and Answer
8Q: Where does glycolysis take place? 908 05b5cc698e4d2b4197774c657
5b5cc698e4d2b4197774c657- 1Mitichondriafalse
- 2Cytoplasmtrue
- 3Mitochondrial outer membranefalse
- 4None of abovefalse
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Answer : 2. "Cytoplasm"
Explanation :
Answer: B) Cytoplasm Explanation: "Glycolysis" means the splitting of glucose. The first step of the process occurs in the cytoplasm of the cell and yields a small amount of energy (measured in units of ATP) and two molecules of pyruvate. The other steps occur in the mitochondria. It is an ongoing process as your cells have a constant need for energy.
Q: Which best describes genetic mutations? 1121 05b5cc68be4d2b4197774c3a1
5b5cc68be4d2b4197774c3a1- 1Genetic mutations that cause diseases are always passed on to offspring.false
- 2Some inherited genetic mutations can be good for the offspring.true
- 3Different genetic mutations cause few forms of cancer.false
- 4Somatic mutations can be inherited from parents or acquired during life.false
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Answer : 2. "Some inherited genetic mutations can be good for the offspring."
Explanation :
Answer: B) Some inherited genetic mutations can be good for the offspring. Explanation: Mutations are accidents in the copying of DNA. A genetic mutation is a random change in the DNA that is passed on further generations of cells and or organisms. Genetic mutations are accidental changes in the DNA in the germ cells or early in the formation of the embryo. These changes if they are in the germ cell will be passed on to other organisms formed by sexual reproduction or asexual reproduction. An example would be the golden delicious apple. A lost of genetic information due to a mutation resulted in a different color of fruit. Genetic mutations that cause diseases are not always passed on to offspring.
Q: Isotopes are atoms of the same element that have different 1183 05b5cc5ffe4d2b4197774b43b
5b5cc5ffe4d2b4197774b43b- 1numbers of neutronstrue
- 2numbers of electronsfalse
- 3numbers of protonsfalse
- 4atomic numbersfalse
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Answer : 1. "numbers of neutrons"
Explanation :
Answer: A) numbers of neutrons Explanation: Isotopes are variations of an element that have the same charge as the original element, but a different mass, which is caused by either more/less neutrons in the nucleus.
Q: Which of the following statements is not true about metabolism? 5084 05b5cc601e4d2b4197774b46c
5b5cc601e4d2b4197774b46c- 1Younger people generally have a slower metabolism than adults.true
- 2Basal metabolism is the amount of energy needed for sustaining life.false
- 3Basal metabolism is measured by the amount of calories burned when your body is inactive.false
- 4Metabolism is influenced by numerous factors, such as heredity and age.false
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Answer : 1. "Younger people generally have a slower metabolism than adults."
Explanation :
Answer: A) Younger people generally have a slower metabolism than adults. Explanation: Metabolism is the set of life-sustaining chemical transformations within the cells of organisms. The three main purposes of metabolism are the conversion of food/fuel to energy to run cellular processes, the conversion of food/fuel to building blocks for proteins, lipids, nucleic acids, and some carbohydrates, and the elimination of nitrogenous wastes. Younger people have faster metabolism than adults. Hence, the given statement 'Younger people generally have a slower metabolism than adults' is FALSE.
Q: Which of the following carbohydrates is a polysaccharide? 1235 05b5cc690e4d2b4197774c42c
5b5cc690e4d2b4197774c42c- 1Fructosefalse
- 2Cellulosetrue
- 3Glucosefalse
- 4Sucrosefalse
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Answer : 2. "Cellulose"
Explanation :
Answer: B) Cellulose Explanation: Carbohydrates are also called as saccharides are molecular compounds made from just three elements: carbon, hydrogen and oxygen. Carbohydrates are: * a source of energy for the body e.g. glucose and a store of energy, e.g. starch in plants * building blocks for polysaccharides (giant carbohydrates), e.g. cellulose in plants and glycogen in the human body * components of other molecules eg DNA, RNA, glycolipids, glycoproteins, ATP Types: 1. Monosaccharides (e.g. glucose) and 2. Disaccharides (e.g. sucrose) are relatively small molecules. They are often called sugars. 3. Other carbohydrate molecules are very large called Polysaccharides such as starch and cellulose.
Q: Which of the following is an air pollutant? 1156 05b5cc5ffe4d2b4197774b3ef
5b5cc5ffe4d2b4197774b3ef- 1Sulphur dioxidetrue
- 2Ozonefalse
- 3Water vapourfalse
- 4Nitric oxidefalse
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Answer : 1. "Sulphur dioxide"
Explanation :
Answer: A) Sulphur dioxide Explanation: Air pollutants are solid particles, gases, and liquid droplets in the air that can adversely affect ecosystems and the health of humans. Major ambient air pollutants include toxic metals, polycyclic aromatic hydrocarbons, benzene, particulate matter (PM), nitrogen oxides, sulfur oxides, carbon monoxide, and ozone. Power plants, factories, and vehicle and air traffic are the most important anthropogenic sources of air pollution. In addition, natural sources such as wildfires and volcanic activity contribute to ambient air pollution.
Q: Which of the following statements about water is false? 1689 05b5cc601e4d2b4197774b462
5b5cc601e4d2b4197774b462- 1There is extensive intramolecular hydrogen bonding in the condensed phase.true
- 2Water is oxidized to oxygen during photosynthesis.false
- 3Ice formed by heavy water sinks in normal water.false
- 4Water can act both as an acid and as a base.false
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Answer : 1. "There is extensive intramolecular hydrogen bonding in the condensed phase."
Explanation :
Answer: A) There is extensive intramolecular hydrogen bonding in the condensed phase. Explanation: Water possess intermolecular hydrogen bonding in the condensed phase. Hence, the given statement 'There is extensive intramolecular hydrogen bonding in the condensed phase.' about water is FALSE.
Q: Which of the following does not influence haemoglobin saturation? 1055 05b5cc695e4d2b4197774c4f1
5b5cc695e4d2b4197774c4f1- 1Nitric oxidetrue
- 2Carbon dioxidefalse
- 3Temperaturefalse
- 4DPGfalse
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Answer : 1. "Nitric oxide"
Explanation :
Answer: A) Nitric oxide Explanation: