Login

Join for Free!
118325 members


Basic Bio Questions

Debate and discussion of any biological questions not pertaining to a particular topic.

Moderator: BioTeam

Basic Bio Questions

Postby edbaseball17 » Tue Sep 18, 2007 10:24 pm

I have a few basic questions that I need answered as I dont have my text book here with me at work and i'm trying to study for a test to be taken tomorrow. Thanks in advance.

1. Which of the following molecules is believed to have been the first "hereditary"(informational) molecule?

a. DNA

b. RNA

c. protein

d. ATP



2. The earliest life forms on the planet are thought to have resembled?

a. Fungi

b. Bacteria

c. a small cell with a nucleus

d. sperm

3. Atoms are particularly stable when they contain ________ electrons in their outer most shell.

a. 4

b. 8

c. 16

d. 32



4. Electrostatic attractions holding atoms together are generally referred to as _____________ bonds

a. ionic

b. covalent

c. hydrogen

d. hydrophobic

5. Which compound is a disaccharide?

a. glycine

b. starch

c. glucose

d. sucrose

6. Lipids, are by definition water ____________.

a. soluble

b. sugars

c. insoluble

d. fats

7. Which of the following represents a test cross?

a. DD X dd

b. D? X dd

c. Dd X Dd

d. D? X D?



8. The "standard" Mendelian ratio of 1:2:1 is a ______________ ratio

involving individuals that are ________________ for a particular gene.

a. phenotypic/ homozygous

b. phenotypic/ heterozygous

c. genotypic/ homozygous

d. genotypic/ heterozygous



9. In human, the gene for freckles is dominant. A woman with freckles, whose father lacked freckles, marries a man whose parents did not have freckles. The genotypes of the man and woman are, respectively,

a. FF, ff

b. ff, Ff

c. Ff, Ff

d. ff, FF



10. DNA directed RNA synthesis is referred to as

a. transcription

b. translation

c. transformation

d. transduction



11. The portion of t-RNA molecule that "codes" for an amino acid

is referred to as the

a. aa code

b. codon

c. anticodon

d. pro-codon



12. The synthesis of ATP from ADP and inorganic phosphate:

a. creates more energy than it uses

b. is exergonic

c. is thermodynamically impossible

d. none of the above



13. Plant cells have chloroplasts and mitochondria.

a. true

b. false

14. Most bacteria are ___________.

a. heterotrophic

b. autotrophic

c. parasitic

d. all of the above

15. ALL proteins are polymers of

a. Monosaccharide

b. Fatty acids

c. Glucose

d. Amino acids



16. Cellulose, starch, and glycogen are all polymers of

a. Sucrose

b. Lactose

c. Fructose

d. Glucose



17. Cellulose, structural proteins, and DNA are ALL polymers.

a. True

b. False



18. Steroids can act as

a. Hormones

b. Structural elements in membranes

c. Only "A" is correct

d. Both "A" and "B" are correct



19. Except for Hydrogen, atoms are "stable" when they have ____ electrons in their outer most shell.

a. 2

b. 4

c. 6

d. 8



20. Atoms held together by electrostatic attraction, are said to be bonded by ____________ bonds

a. Ionic

b. Nuclear

c. Covalent

d. Hydrogen
edbaseball17
Garter
Garter
 
Posts: 3
Joined: Tue Sep 18, 2007 10:20 pm

Postby mith » Tue Sep 18, 2007 11:35 pm

You have access to the internet, so much more powerful.
you can get started here http://www.biology-online.org/kb/tutorials.html
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
User avatar
mith
Inland Taipan
Inland Taipan
 
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN

Postby edbaseball17 » Wed Sep 19, 2007 12:06 am

thanks, i've been searching and searching all night. got most of them answered.
edbaseball17
Garter
Garter
 
Posts: 3
Joined: Tue Sep 18, 2007 10:20 pm


Postby kotoreru » Wed Sep 19, 2007 9:31 am

That first question could do with some re-wording. At first I thought it was after what scientists thought was the hereditary material at first, which was protein.

Les sigh...
"What are humans if they don't learn at University? Animals, yes."

^^One of my ex-girlfriends said that. I stress the ex part.
User avatar
kotoreru
Coral
Coral
 
Posts: 400
Joined: Thu Apr 12, 2007 9:25 pm
Location: London

Postby tmninja_baby » Fri Sep 21, 2007 4:35 am

ok i have a really simple question but i simply cant remember.

i need to know what exactly is a protein?????
tmninja_baby
Garter
Garter
 
Posts: 1
Joined: Fri Sep 21, 2007 4:12 am

Postby mith » Fri Sep 21, 2007 4:48 am

Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
User avatar
mith
Inland Taipan
Inland Taipan
 
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN

Postby daniel.kurz » Sun Sep 23, 2007 3:21 am

kotoreru wrote:That first question could do with some re-wording. At first I thought it was after what scientists thought was the hereditary material at first, which was protein.

Les sigh...

That's totally true. Because nobody can be sure which came first. Because face it ribosomes are made up of proteins and they use RNA so you can't be sure.
daniel.kurz
Coral
Coral
 
Posts: 167
Joined: Fri May 19, 2006 1:47 am


Return to General Discussion

Who is online

Users browsing this forum: No registered users and 8 guests