Biology Junction Team - BIOLOGY JUNCTION

Line Graph Quiz

%CODE1% Line Graphs Quiz

Click on the radio buttons in front of the correct answers to the questions.

Line Graph of Temperatures

Bar Graph Animated title

BAR GRAPHS

When you have finished this page, try the Bar Graphs Quiz.

Bar graphs are an excellent way to show results that are one time, that aren’t continuous – especially samplings such as surveys, inventories, etc. Below is a typical survey asking students about their favorite after school activity. Notice that in this graph each column is labeled – it is also possible to label the category to the left of the bar.

In this case, the numbers for each category are across the bottom of the chart.

A bar chart is marked off with a series of lines called grid lines. These lines typically mark off a numerical point in the series of numbers on the axis or line. In this case, each grid line going up and down marks a multiple of 20 as the graph is divided such.More gridlines can make it easier to be exact with the amounts being shown on the bar graph, but too many can make it confusing.

Notice that for data that does not fall evenly on a multiple of 20, the bar is in between two grid lines.

Bar graphs are useful to get an overall idea of trends in responses – which categories get many versus few responses.

Favorite Student After School Activity

Activity	Number
Visit W/Friends	175
Talk on Phone	168
Play Sports	120
Earn Money	120
Use Computers	65

BAR GRAPH QUIZ

Click on the radio buttons in front of the correct answers to the questions about the graph.

Bar Graph

Circle Pie Graph Title CIRCLE/PIE GRAPHS

When you have finished this page, try the Circle/Pie Graphs Quiz.

Circle or pie graphs are particularly good illustrations when considering how many parts of a whole are inception. In the table below both the number of hours in a whole day devoted to certain activities is listed as well as the percent of time for each of these activities. The pie chart is then divided very much as a baker’s pie would be into slices that represent the proportional amounts of time spent on each activity.

To the right of the pie chart is a legend that tells which color stands for which category. In addition, the percents are also near the pie slice that stands for that particular amount of time spent.

Percent of Hours of a Day Spent on Activities

ACTIVITY	HOURS	PERCENT OF DAY
Sleep	6	25
School	6	25
Job	4	17
Entertainment	4	17
Meals	2	8
Homework	2	8

Pie Graph of Day's Activities

Circle/Pie Graph Quiz

Click on the radio buttons in front of the correct answers to the questions.

Chart of Day's Activities

Cell Quiz

%CODE1%

	Cells!
	1. The door to your house is like the ___ of a cell membrane? phospholipid bilayer gated channel receptor protein recognition protein 2. The phospholipid bilayer of the cell membrane is like a(n): screen door plate glass window hot water heater oven 3. Facilitated diffusion ____ require energy and uses the help of ______ does, transport proteins does, cytoplasm does not, transport proteins does not, sodium pumps 4. A semi permeable membrane is stretched across a chamber filled with water. The membrane is only permeable to water. 60 mg of salt is added to the left side of the chamber. Which of the following will happen? water will move toward the right side salt will move toward the right side water will move toward the left side salt will move toward the left side 5. The lipid bilayer keeps the inside of the cell membrane: bipolar protein saturated dry wet 6. Which of the following could be found in BOTH the nucleus and the cytoplasm nucleolus ribosomes RNA both RNA & ribosomes 7. Amino acid chains built by the ribosomes then move to the: golgi apparatus lysosome endoplasmic reticulum mitochondria 8. Which of the following structures has a 9 + 2 arrangement? flagella ribosome mitochondria golgi apparatus 9. The centriole is most like the: lysosome flagella mitochondria chromatin 10. Which of the following is composed of a large and a small subunit? golgi apparatus endoplasmic reticulum mitochondria ribosome 11. A cell that is missing lysosomes would have difficulty doing what? digesting food storing energy packaging proteins moving cytoplasm 12. Which of the following cell parts is described as a “fluid mosaic”? chloroplast vacuole cell membrane endoplasmic reticulum 13. Some cells take in large molecules through the process of: protein synthesis endocytosis cytoplasmic streaming ATP 14. Which of the following organelles would NOT be found in a plant cell? chloroplast DNA food vacuole cell membrane Score = Correct answers:

BACK

DNA QUIZ

%CODE1%

DNA QUIZ

1. Name this structure.
deoxynucleic acid
deoxyribonucleic acid
denatured ribonucleic acid
deoxoribonuclear acid2. The process by which RNA is made from DNA:
synthesis
translation
transcription
replication

3. Adenine always pairs with:
thymine
cytosine
guanine
ribose

4. The “rungs” of the DNA ladder are made of:
phosphates and hydrogen
glucose and sugars
sugars and phosphates
base pairs

5. The DNA molecule is held together by:
magnetism
glucose
glue
hydrogen bonds

6. The process by which DNA makes a copy of itself is called:
synthesis
replication
transcription
translation

7. A gene is:
a segment of DNA that codes for a protein
a set of homologous chromosomes
a molecule within DNA
a type of pants

8. The twisted ladder shape of DNA is called a:
hydrogen twist
deoxyribose flip
double helix
double membrane

9. The sugar found in DNA is:
equal
deoxyribose
ribose
glucose

10. Which of the following takes the genetic code to the cytoplasm:
DNA
deoxyribose
tRNA
mRNA

11. The three nucleotide sequence on RNA is called a:
tRNA
codon
triplet
gene

12. Three nucleotides code for:
1 amino acid
3 amino acids
1 protein
3 proteins

13. RNA differs from DNA in that:
it has a different kind of sugar
it is single stranded
it has uracil
all of these

14. DNA is called the “blueprint of life” because:
it is like a fingerprint
it has a blue color
it contains the plans for building an organism
it can relay messages to other molecules

15. The two men who established the structure of DNA were:

Frederick and Alvers
Watson and Crick
Berkely and Fry
Darwin and Lamarke

Score =
Correct answers:

Mitosis Quiz

%CODE1%

Mitosis

cell

What phase is this cell in?

prophase
metaphase
anaphase
telopase

2. During which phase do chromosomes become visible?

telophase
anaphase
prophase
interphase

cell

3. Which phase is this cell in?

prophase
telophase
metaphase
interphase

4. A cell with 10 chromosomes undergoes mitosis and cell division. How many daughter cells are produced and what number of chromosomes do they have?
2 daughter cells, 5 chromosomes each
1 daughter cell, 10 chromosomes each
4 daughter cells, 20 chromosomes each
2 daughter cells, 10 chromosomes each

5. During which phase does the spindle form?
prophase
interphase
metaphase
anaphase

cell

6. Which phase is the cell in?
prophase
telophase
interphase
metaphase

7. The process where the cytoplasm divides and forms two new cells is called:
mitosis
cytokinesis
karyotype
spindle formation

cell

8. What phase is the cell in?
anaphase
interphase
telophase
prophase

9. Cytokinesis begins in:
interphase
metaphase
telophase
prophase

10. What is depicted in the illustration?
mitosis of an animal cell
cytokinesis of an animal cell
mitosis of a plant cell
cytokinesis of a plant cell

Decimals, Fractions and Percentages

%CODE1%

Decimals, Fractions and Percentages

Decimals, Fractions and Percentages are just different ways of showing the same value:

A Half can be written…

As a fraction:	1/2
As a decimal:	0.5
As a percentage:	50%

A Quarter can be written…

As a fraction:	1/4
As a decimal:	0.25
As a percentage:	25%

Here, have a play with it yourself:

View Larger

Example Values

Here is a table of commonly occuring values shown in Percent, Decimal and Fraction form:

Percent	Decimal	Fraction
1%	0.01	1/100
5%	0.05	1/20
10%	0.1	1/10
12½%	0.125	1/8
20%	0.2	1/5
25%	0.25	1/4
331/3%	0.333…	1/3
50%	0.5	1/2
75%	0.75	3/4
80%	0.8	4/5
90%	0.9	9/10
99%	0.99	99/100
100%	1
125%	1.25	5/4
150%	1.5	3/2
200%	2

Conversions

From Percent to Decimal

To convert from percent to decimal: divide by 100, and remove the “%” sign.

The easiest way to divide by 100 is to move the decimal point 2 places to the left. So:

From Percent	To Decimal
		move the decimal point 2 places to the left, and remove the “%” sign.

From Decimal to Percent

To convert from decimal to percent: multiply by 100, and add a “%” sign.

The easiest way to multiply by 100 is to move the decimal point 2 places to the right. So:

From Decimal	To Percent
		move the decimal point 2 places to the right, and add the “%” sign.

From Fraction to Decimal

The easiest way to convert a fraction to a decimal is to divide the top number by the bottom number (divide the numerator by the denominator in mathematical language)

Example: Convert 2/5 to a decimal

Divide 2 by 5: 2 ÷ 5 = 0.4

Answer: 2/5 = 0.4

From Decimal to Fraction

To convert a decimal to a fraction needs a little more work.

Example: To convert 0.75 to a fraction

Steps	Example
First, write down the decimal “over” the number 1	0.75 / 1

Then multiply top and bottom by 10 for every number after the decimal point (10 for 1 number, 100 for 2 numbers, etc)	0.75 × 100 / 1 × 100
(This makes it a correctly formed fraction)	= 75 / 100
Then Simplify the fraction	3 / 4

From Fraction to Percentage

The easiest way to convert a fraction to a percentage is to divide the top number by the bottom number. then multiply the result by 100, and add the “%” sign.

Example: Convert 3/8 to a percentage

First divide 3 by 8: 3 ÷ 8 = 0.375,
Then multiply by 100: 0.375 x 100 = 37.5
Add the “%” sign: 37.5%

Answer: 3/8 = 37.5%

From Percentage to Fraction

To convert a percentage to a fraction, first convert to a decimal (divide by 100), then use the steps for converting decimal to fractions (like above).

Example: To convert 80% to a fraction

Steps	Example
Convert 80% to a decimal (=80/100):	0.8
Write down the decimal “over” the number 1	0.8 / 1

Then multiply top and bottom by 10 for every number after the decimal point (10 for 1 number, 100 for 2 numbers, etc)	0.8 × 10 / 1 × 10
(This makes it a correctly formed fraction)	= 8 / 10
Then Simplify the fraction	4 / 5