Atomic Mass and Atomic Number Quiz
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Questions and Answers

What is the main concept highlighted in the first lecture of Human Biology?

  • The chemical components of cells
  • Chemical bonding of atoms makes molecules (correct)
  • Biological buffering system
  • The importance of Water

What is the significance of Carbon in the context of the lecture?

  • It helps in understanding the essential elements for living organisms
  • It is essential for describing the building blocks of a cell
  • It is important for the buffering system of the cell
  • It is a chemical component of cells (correct)

Why do biology and cell biology heavily depend on chemistry and physics?

  • To study the components that make up living organisms
  • To discuss real-life problems and solutions
  • To understand molecular structure and chemical reactions of cells (correct)
  • To appreciate physical properties of water

Why is understanding the buffering system of the cell important?

<p>To appreciate cellular structure and function in terms of chemical events (D)</p> Signup and view all the answers

How does the lecture describe carbohydrates?

<p>As building blocks that make up the cell (A)</p> Signup and view all the answers

What facilities are available to deliver the lectures in Human Biology according to the text?

<p>Daily Quizzes along with PowerPoint slides, videos, and pictures (B)</p> Signup and view all the answers

What is the definition of atomic mass or atomic weight?

<p>The sum of protons and neutrons in an atom (B)</p> Signup and view all the answers

Why is helium used instead of hydrogen in balloons?

<p>Hydrogen is flammable while helium is not (B)</p> Signup and view all the answers

What are the three basic components of an atom?

<p>Protons, neutrons, electrons (B)</p> Signup and view all the answers

Where are protons and neutrons located within an atom?

<p>Surrounding the nucleus (B)</p> Signup and view all the answers

What distinguishes one element from another?

<p>Atomic number (D)</p> Signup and view all the answers

What do isotopes refer to in relation to atoms?

<p>Atoms with different numbers of neutrons but the same number of protons (C)</p> Signup and view all the answers

What is the attraction between protons and electrons in an atom compared to?

<p>Attraction between two positively charged magnets (C)</p> Signup and view all the answers

What determines the distance of electrons from an atom's nucleus?

<p>The amount of energy the electrons have (D)</p> Signup and view all the answers

Why are radioisotopes considered unstable?

<p>They tend to give off radiation and particles to reach a stable state (C)</p> Signup and view all the answers

Why can radiation emitted by radioisotopes be dangerous to living organisms?

<p>It can damage tissues by releasing energy and particles (B)</p> Signup and view all the answers

Which subatomic particle is responsible for the negative charge in an atom?

<p>Electron (B)</p> Signup and view all the answers

What property differentiates one element from another?

<p>Atomic number (D)</p> Signup and view all the answers

What do electrons tend to do when positioning themselves around the centre of the atom?

<p>Pair up to form energy levels (B)</p> Signup and view all the answers

How many electrons can the first orbital or level of an atom contain?

<p>2 (A)</p> Signup and view all the answers

Which two elements make up over 98% of all living material by weight?

<p>Carbon and Hydrogen (A)</p> Signup and view all the answers

What happens when atoms transfer electrons to fill their outermost electron shells?

<p>They react due to unbalanced electrostatic charges (C)</p> Signup and view all the answers

Which element from Table-1 has an atomic number of 15?

<p>Nitrogen (C)</p> Signup and view all the answers

What is the basis for the vast variety of chemical reactions and chemical bonds that occur in nature?

<p>Tendency of atoms to fill their outermost electron energy level (A)</p> Signup and view all the answers

What is the recommended way to add phytochemicals to the diet according to nutritionists?

<p>Moderately consume foods with phytochemicals (B)</p> Signup and view all the answers

What phytochemical found in tomatoes, strawberries, and watermelon gives them their red color?

<p>Lycopene (B)</p> Signup and view all the answers

Apart from citrus fruits, which other food group mentioned contains Vitamin C and flavonoids?

<p>Cantaloupes and plums (D)</p> Signup and view all the answers

What is the main role of antioxidants in the body?

<p>Preventing damage to cell molecules by free radicals (A)</p> Signup and view all the answers

Which hormone serves as a natural antioxidant in the body?

<p>Melatonin (B)</p> Signup and view all the answers

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