Chemistry of life

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Questions and Answers

Which of the following biomolecules is a monosaccharide?

  • Monosaccharide (correct)
  • Nucleotide
  • Fatty acid
  • Amino acid

What is the atomic number of carbon?

  • 2
  • 6 (correct)
  • 8
  • 16

How many shared electrons can carbon accommodate in its outer shell when forming covalent bonds?

  • 4 (correct)
  • 6
  • 2
  • 8

How many covalent bonds can oxygen form?

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

How many covalent bonds can sulfur form?

<p>4 (A)</p> Signup and view all the answers

How many covalent bonds can nitrogen form?

<p>4 (B)</p> Signup and view all the answers

How many covalent bonds can phosphorus form?

<p>4 (A)</p> Signup and view all the answers

Which of the following elements has the highest atomic number?

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

Which of the following elements can make the most covalent bonds?

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

Which of the following elements has the least number of electrons in its outer shell?

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

Hydrogen in a covalent bond with which atom(s) in the table creates a polar bond?

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

Which part of the water molecule will be more negative and why: the oxygen or the hydrogen?

<p>Oxygen, because it attracts more electrons (C)</p> Signup and view all the answers

What type of bond occurs between a (+)δ H on one molecule and a (-)δ O (or N or sometimes S) on a neighboring molecule?

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

What type of non-covalent bond involves transient electrostatic interactions between permanent or induced dipoles?

<p>Van der Waals force (D)</p> Signup and view all the answers

What happens to hydrophobic molecules in water?

<p>They aggregate and do not bond with water (B)</p> Signup and view all the answers

What type of bond occurs between oppositely charged molecules?

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

What is the functional group represented by R– C–H?

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

What is the functional group represented by R – C – O – C – R’?

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

What is the functional group represented by R – C – N?

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

What is the functional group represented by R – O – R’?

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

Which functional group can be cleaved from molecules such as ATP to provide energy?

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

What is the general formula for monosaccharides?

<p>(CH2O)n (A)</p> Signup and view all the answers

What is the generic name for a monosaccharide with a 6-atom ring structure?

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

What functional group is found at the end of a fatty acid?

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

What type of bond is formed between fatty acids and glycerol in the creation of mono-, di-, or tri-glycerides?

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

What is the general structure of an amino acid?

<p>R group + amino group + carboxyl group (D)</p> Signup and view all the answers

What type of bond is formed between amino acids in the formation of proteins?

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

What are the two types of nucleotides based on the structure of their nitrogenous base?

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

What is the general structure of a nucleotide?

<p>Nitrogenous base + 5-C sugar + Phosphate group(s) (A)</p> Signup and view all the answers

What type of bond is formed between nucleotides in the formation of nucleic acids?

<p>Phosphodiester bond (D)</p> Signup and view all the answers

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