Question 1

Which of the following best describes the importance of atomic number in determining the properties of an element?

Accepted Answer

It determines the number of protons, which defines the element and its chemical behavior.

Question 2

Which statement correctly explains the concept of an ion?

Accepted Answer

An ion is an atom or molecule that has gained or lost electrons, resulting in a net charge.

Question 3

The octet rule states that atoms tend to:

Accepted Answer

Gain, lose, or share electrons to achieve eight electrons in their outermost shell.

Question 4

Which of the following is considered an organic molecule?

Accepted Answer

C6H12O6

Question 5

Polarity in molecules is primarily determined by:

Accepted Answer

The difference in electronegativity between atoms in a bond.

Question 6

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

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 7

What is the general structure of an amino acid?

Accepted Answer

$$NH_2-$$CHR-COOH$$

Question 8

Which type of bond is formed between monomers in a polysaccharide?

Accepted Answer

Glycosidic bond

Question 9

In the formation of triglycerides, which specific covalent bond is formed between glycerol and fatty acids?

Accepted Answer

Ester bond

Question 10

Which process involves the removal of water to join two monomers together?

Accepted Answer

Dehydration synthesis

Question 11

What type of bond stabilizes the double helix structure of DNA?

Accepted Answer

Hydrogen bonds between complementary nitrogenous bases

Question 12

Which of the following correctly distinguishes between eukaryotic and prokaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus and membrane-bound organelles; prokaryotic cells do not.

Question 13

Which organelle is responsible for producing ATP in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 14

Which component of the cytoskeleton is primarily involved in cell division and chromosome movement?

Accepted Answer

Microtubules

Question 15

Which two types of molecules primarily make up the plasma membrane?

Accepted Answer

Phospholipids and proteins

Question 16

Which type of molecule can most easily diffuse across the plasma membrane due to selective permeability?

Accepted Answer

Small nonpolar molecules

Question 17

A patient is diagnosed with a genetic disorder affecting the structure of their DNA. Which type of bond would most likely be altered, affecting the stability of the DNA double helix?

Accepted Answer

Hydrogen bonds between base pairs

Question 18

During vigorous exercise, muscle cells rely on which organelle to meet increased energy demands?

Accepted Answer

Mitochondria

Question 19

Which of the following best explains why water is a polar molecule?

Accepted Answer

Oxygen is more electronegative than hydrogen, creating a partial negative charge near oxygen and a partial positive charge near hydrogen.

Question 20

Which of the following is a correct application of dehydration synthesis in biological systems?

Accepted Answer

Forming a peptide bond between two amino acids by removing a water molecule.

General Biology: Fundamental Concepts and Cell Structure Study Guide

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