Question

Which of the following is caused by a germ cell mutation?
A. Asbestos disease
B. Common cold
C. Down Syndrome
D. Formalydehyde poisoning

Answer 1

@Opcode

Answer 2

I'm not sure.
I think its B tho.
Because the common cold can be caught more than once, this is because of mutation.

Answer 3

Which statement is true about a solution that has a pH of 3?
A. It is abnormal.
B. It is acidic.
C. It is alkaline.
D. It is neutral.

Answer 4

Look at the scale.
If something has the pH of 3 it's more acidic. :3

Answer 5

What is a chain of nucleotides joined together by hydrogen bonds between the phosphate group of one nucleotide and the deoxyribose sugar of another nucleotide?
A. DNA
B. RNA
C. A helix
D. Nucleotide bonds
on tht uther one i put neutial XD

Answer 6

Isn't that DNA [Deoxyribonucleotide]?

Answer 7

i put helix and got it wrong bt mabey

Answer 8

Environmental and lifestyle factors contribute to somatic mutations. Which of the following is a lifestyle factor?
A. Contaminated water
B. Lead paint
C. Nuclear radiation
D. Smoking tobacco
i didnt even know this one @ all

Answer 9

@Reaper534
I'm not sure either I think its Nuclear radiation tho.
(@InYourHead when you get on what do you think it is?)

Answer 10

@InYourHead

Answer 11

i got my last 3 and im done for this one

Answer 12

A network of canals that is covered with ribosomes is called ___________.
A. the cell membrane
B. the Golgi Apparatus
C. rough endoplasmic reticulum
D. smooth endoplasmic reticulum

Answer 13

Oh! I know this is something to do with the endoplasmic reticulum. I'm just not sure which one :O

"Endoplasmc reticulum forms ribosomes which form protein and send them to golgi apparatus which packs them and sends them out of the cell."
So your answer is B. the Golgi Apparatus

Answer 14

If the nucleotide sequence of a strand of complementary DNA is GTAA, what is the nucleotide sequence on the parent strand of DNA?
A. ACTT
B. CATT
C. TCGG
D. TGCC

Answer 15

Oh I hate these types of questions -.-
Sorry I don't know :|

Answer 16

lol ikr

Answer 17

well thts it thx

Answer 18

I'll leave that question to @InYourHead ....

Answer 19

lol ok

Answer 20

1. Which of the following is caused by a germ cell mutation?

"Germ cells" are cells that eventually become sex cells.

So, a "germ cell mutation" is what we call a birth defect.

Do you know what Down Syndrome is?

It's a genetic birth defect.
And it happens when someone has an extra chromosome,
in chromosome pair #21.

~~~~~~~~~~~~~~~~

2. Environmental and lifestyle factors contribute to somatic mutations. Which of the following is a lifestyle factor?

"Lifestyle factors" are the ways that people choose to live their lives.

Take a look at D - smoking tobacco.
That's cigarette smoking, which is a lifestyle factor.
It's something that we deliberately choose to do, with our bodies.
And it affects our health.

~~~~~~~~~~~~~~~

3. A network of canals that is covered with ribosomes is called ___________.

Take a look at this picture:
http://diseasespictures.com/wp-content/uploads/2012/07/Endoplasmic-Reticulum.jpg

It's a picture of the Rough Endoplasmic Reticulum.

See how it's covered in ribosomes?
That's the one that the question is asking about.

The Golgi Apparatus does package the ribosomes,
but it is not the organelle that is actually COVERED IN ribosomes.

~~~~~~~~~~~~~~~~~~~~~

4. If the nucleotide sequence of a strand of complementary DNA is GTAA, what is the nucleotide sequence on the parent strand of DNA?

This is how base pairs of DNA match up:

A goes with T
G goes with C

Now, let's take a look at our DNA strand:

G T A A

That means that the complimentary strand would be...

C A T T

You see?

Once again...

Original DNA: G T A A
Complementary DNA: C A T T

See how the letters match up?

A goes with T
G goes with C

Answer 21

thx man