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2nd semester mid-review

Total questions: 41

Worksheet time: 33mins

Name
Class
Date
1.

Which of the following biomolecules is correctly paired with its function?

a)

Carbohydrates - long-term energy storage

b)

Cell membrane - build muscle

c)

Nucleic acids - growth maintenance

d)

Lipids - long-term energy storage

2.

Which of the following macromolecules is correctly paired with its function?

a)

Protein - short-term energy storage

b)

Nucleic acids - genetic information (DNA/RNA)

c)

Lipids - speed up chemical reactions

d)

Lipids - short-term energy storage

3.

Letter "E" represent the __________

a)

Phospholipids

b)

Active site

c)

Products

d)

Enzyme

4.

An ___________ is a type of protein that speeds up a chemical reaction in a living thing by lowering their activation energy.

a)

Dog

b)

Cell Cycle

c)

Substrate

d)

Enzyme

5.

Most human enzymes operate under an optimal pH near neutral. Which pH range would best represent this environment?

a)

1-3 pH

b)

4-5 pH

c)

6-8 pH

d)

10-14 pH

6.

The optimal pH for Pepsin is:

a)

1.5

b)

5

c)

7.3

d)

8.2

7.

A ________ is the reactant on which an enzyme works.

a)

Enzyme

b)

Products

c)

Substrate

d)

Enzyme-Substrate Complex

8.

What is the significance of nucleic acids for cells?

a)

They generate energy for the cell.

b)

They provide all instructions for cellular activities.

c)

They restrict what enters and leaves the cell.

d)

They support and maintain the shape of the cell.

9.

Which biomolecule is in pastas and breads?

a)
Lipid
b)
Protein
c)
Nucleic Acid
d)
Carbohydrate
10.
Which biomolecule helps form muscles?
a)
Nucleic Acid
b)
Carbohydrate
c)
Protein
d)
Lipids
11.

Which are examples of lipids?

a)

glucose, pasta, bread

b)

fats, oils, waxes

c)

meats, enzyme, lactase, eggs

d)

DNA, RNA

12.

Which biomolecule makes up cell membranes?

a)

Protein

b)

Carbohydrate

c)

Lipid

d)

Nucleic acid

13.

Chromatids separate

a)

Anaphase

b)

Metaphase

c)

Prophase

d)

Telophase

14.
What is the purpose  of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
15.

Which of the 4 main biomolecules is DNA?

a)

carbohydrate

b)

lipid

c)

nucleic acid

d)

protein

16.

DNA _________________ is the process of copying DNA to prepare for cell division.

a)

replication

b)

duplicity

c)

dynamism

d)

relocation

17.

Do all cells within a single organism have the same DNA?

a)

no, each cell has different DNA because it has differing jobs from other cells

b)

no, only certain types of cells contain the DNA, which is the blueprint or genetic code for the organism

c)

yes, differing cells just read different instructions from the DNA, turning genes on and off

d)

yes, because all cells among any particular species all have the exact same DNA.

18.

A T C C G

? ? ? ? ?

Identify the correct complementary nucleotides for the parent strand above.

a)

A T C C G

b)

G C T T A

c)

C G A A C

d)

T A G G C

19.

Which of the following is the longest phase in the cell cycle?

a)

G1

b)

G2

c)

Interphase

d)

Mitosis

20.

G1 phase is the initial ______________ phase.

a)

growth

b)

rest

c)

division

d)

duplication

21.

In which phase of the cell cycle does replication of the DNA occur?

a)

G1

b)

G2

c)

S

d)

M

22.

What important process occurs during the M phase?

a)

DNA Replication

b)

Mitosis

c)

Growth and repair

d)

Rest and repair

23.
What elements are common to all 4 biomolecules?
a)
Carbon, hydrogen, nitrogen
b)
Carbon, Nitrogen, Phosphorus
c)
Carbon, Hydrogen, Oxygen
d)
Carbon, Hydrogen, Phosphorus
24.

What is the first phase of mitosis?

a)

Cytokinesis

b)

Prophase

c)

Anaphase

d)

Metaphase

25.

Where does DNA reproduce?

a)

Mitosis

b)

Synthesis

c)

G2

26.

Nuclear membrane reforms around the new daughter cells.

Cytoplasm begins to "pinch" in.

a)

Anaphase

b)

Metaphase

c)

Telophase

d)

Interphase

27.

What does phase C represent?

a)

Mitosis

b)

G2

c)

G1

28.

During which phase does the cell actually separate into two individual daughter cells?

a)

Prophase

b)

Cytokinesis

c)

Interphase

d)

Metaphase

29.

Which nitrogenous bases are needed to complete the DNA strand pictured below? Give your answer in order, from top to bottom.

a)

thymine, adenine, guanine, cytosine

b)

adenine, thymine, guanine, cytosine

c)

adenine, thymine, cytosine, guanine

d)

cytosine, guanine, thymine, adenine

30.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-5
d)
1-20
31.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
32.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
33.

Nuclear membrane disappears

Chromosomes can now be seen

Centrioles move to opposite sides

a)

Metaphase

b)

Interphase

c)

Telophase

d)

Prophase

34.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
35.

What are the 4 RNA nitrogen bases?

a)

adenine, thymine, cytoplasm, and guanine

b)

adenine, thymine cytosine, and guanine

c)

adenine, uracil, cytoplasm, and guanine

d)

adenine, uracil, cytosine, and guanine

36.

RNA is double-stranded.

a)

true

b)

false

c)

it depends on the type

37.

Using this DNA sequence ATA CGA GGA TTT, what is the complementary RNA sequence will be

a)

UAU GCU CCU AAA

b)

UAU GCU CCU TTT

c)

TAT GCT CCT AAA

d)

TAT GCT CCT TTT

38.
What is the difference between DNA and RNA in terms of bases?
a)
RNA contains uracil in place of thymine
b)
RNA contains uracil in place of adenine
c)
RNA contains uracil in place of guanine
d)
RNA contains uracil in place of  cytosine
39.

95% of the cells life cycle

Stage where DNA is copied

a)

Interphase

b)

Metaphase

c)

Telophase

d)

Prophase

40.

Chromosomes line up at the equator of the cell

Spindle fibers extend from the centrioles to the middle of the chromosomes

a)

Prophase

b)

Metaphase

c)

Anaphase

d)

Interphase

41.
The middle part that holds the two chromatids together is called the
a)
Chromatin
b)
Centriole
c)
Centromere
d)
Nucleus

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