Curriculum
Course: AP BIOLOGY
Login

Curriculum

AP BIOLOGY

1. Chemistry of Life

0/22

2. Cells

0/34

3. Cellular Energetics

0/24

4. Cell Communication and Cell Cycle

0/18

5. Heredity

0/14

6. Gene Expression and Regulation

0/29

7. Natural Selection

0/33

8. Ecology

0/20

AP Biology - Plants and Human Body Systems

0/19

AP Biology - Laboratory review

0/4

AP Biology - Diagnostic exam

0/1

AP Biology - Practice Test 1

0/1

AP Biology - Practice Test 2

0/1
Quiz

1.1.2 Building Biological Molecules – Unit exam questions

Submit quiz
Once you submit, you will no longer be able to change your answers. Are you sure you want to submit the quiz?
Cancel Submit
  • Questions count: 12
  • Passing grade: B+
Start Quiz
1.
Breaking a covalent bond is
exothermic
endothermic
neither
always spontaneous
2.
IGCSE Chemistry 2.5 Simple molecules and covalent bonds - Question 9
IGCSE Chemistry 2.5 Simple molecules and covalent bonds - Question 9
A
B
C
D
3.
Which halogen molecule in the chart has the strongest covalent bond?
Dr Dabour Hub Academy - figure 1
Cl₂, with the highest bond dissociation energy (243 kJ/mol)
F₂, because fluorine is most electronegative
I₂, because it is the largest
All are equal because each has a single bond
4.
IGCSE Chemistry 2.5 Simple molecules and covalent bonds - Question 7
IGCSE Chemistry 2.5 Simple molecules and covalent bonds - Question 7
A
B
C
D
5.
Which statement best describes Covalent bond?
The energy required to break a specific covalent bond.
A bond formed by parallel overlap of p orbitals, found in double and triple bonds.
A chemical bond formed by sharing valence electrons.
A model showing shared pairs as lines and unshared pairs as dots.
6.
Why does a covalent bond hold two atoms together?
The nuclei attract each other directly
The electrons repel the nuclei together
Gravity holds the atoms together
Both nuclei are attracted to the shared electron pair between them
7.
IGCSE Chemistry 2.5 Simple molecules and covalent bonds - Question 6
IGCSE Chemistry 2.5 Simple molecules and covalent bonds - Question 6
A
B
C
D
8.
IGCSE Chemistry 2.5 Simple molecules and covalent bonds - Question 10
IGCSE Chemistry 2.5 Simple molecules and covalent bonds - Question 10
A
B
C
D
9.
IGCSE Chemistry 2.5 Simple molecules and covalent bonds - Question 8
IGCSE Chemistry 2.5 Simple molecules and covalent bonds - Question 8
A
B
C
D
10.
The missing value in the table is 4, because carbon usually forms four covalent bonds. True or false?
False, carbon forms 2 bonds
False, carbon forms 6 bonds
True only in diamond
True, the statement is correct
11.
Hydrogen forms only one covalent bond. True or false?
True, the statement is correct
False, it forms two
False, it forms four
True only in water
12.
Breaking a covalent bond is endothermic. True or false?
False, it is exothermic
True, the statement is correct
False, it has no energy change
True only for triple bonds
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
Part of 1. Chemistry of Life — see every lesson and quiz in this unit.
Accepted payment methods