Question 1

Which of the following best describes the shape that carbon molecules form when all bonds are single covalent bonds?

Accepted Answer

Tetrahedral geometry

Question 2

How many valence electrons does a carbon atom have, and how does this relate to the number of covalent bonds it can form?

Accepted Answer

Carbon has 4 valence electrons and can form 4 covalent bonds.

Question 3

Which element can form the most covalent bonds due to its valence electron configuration?

Accepted Answer

Carbon

Question 4

If you have a chain of three glucose molecules joined together, what type of molecule have you formed?

Accepted Answer

A trisaccharide (oligosaccharide)

Question 5

Which of the following is NOT a carbohydrate discussed in class?

Accepted Answer

Collagen

Question 6

Which statement best describes the difference between saturated and unsaturated fats?

Accepted Answer

Unsaturated fats contain one or more double bonds, causing kinks in the fatty acid chain.

Question 7

What is the primary function of amino acids in biological systems?

Accepted Answer

Catalyzing chemical reactions and building proteins

Question 8

Which of the following best describes a dehydration synthesis reaction?

Accepted Answer

Joining monomers to form polymers by removing water

Question 9

Which functional group is found in all amino acids and is responsible for their acidic properties?

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 10

Which of the following is the correct order of protein structure from simplest to most complex?

Accepted Answer

Primary, secondary, tertiary, quaternary

Question 11

Which type of bond is primarily responsible for holding together the secondary structure of proteins?

Accepted Answer

Hydrogen bonds

Question 12

Which of the following is a feature of phospholipids that makes them essential for cell membranes?

Accepted Answer

They have both hydrophilic and hydrophobic regions

Question 13

Which of the following is a purine base found in DNA?

Accepted Answer

Adenine

Question 14

How do the bases pair in DNA according to the base-pairing rules?

Accepted Answer

$$A$$ pairs with $$T$$, $$C$$ pairs with $$G$$

Question 15

Which of the following statements correctly describes the difference between DNA and RNA?

Accepted Answer

RNA contains ribose sugar, while DNA contains deoxyribose sugar.

Question 16

Which of the following is an example of isomers in biological molecules?

Accepted Answer

Glucose and fructose, both with the formula $$C_6H_{12}O_6$

Question 17

A patient is diagnosed with a genetic disorder that affects the formation of hydrogen bonds in proteins. Which level of protein structure is most likely to be affected?

Accepted Answer

Secondary structure

Question 18

Which of the following best explains why proteins are considered such a diverse biological polymer?

Accepted Answer

They can fold into a variety of shapes due to different side chains and interactions.

Question 19

Which of the following is the correct chemical formula for a glucose molecule?

Accepted Answer

$$C_6H_{12}O_6$

Question 20

Which of the following is a correct description of a peptide bond?

Accepted Answer

A covalent bond formed between the carboxyl group of one amino acid and the amino group of another

General Biology Study Guide: Biomolecules, Structure, and Function

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