General Biology

Half-Life Problem

Half-Life Problem

Need help answering this question...........

The half-life of radium-226 is 1620 years. If a sample of material contains 16 milligrams of radium-226, how much will it contain in 1620 years? How much will it contain in 3240 years? How long

qew   11637   1 Reply

duddy

Energy and Carbohydrate Q

Energy and Carbohydrate Q

This is another question from my exam review, please help...

Why do plants typically store their excess energy as carbohydrates rather than fat?

qew   1741   3 Replies

karim89

What specific cytoskeletal protein (or proteins) has its function altered as the ultimate effect of ...

What specific cytoskeletal protein (or proteins) has its function altered as the ultimate effect of ...

Hey, my question was:

What specific cytoskeletal protein (or proteins) has its function altered as the ultimate effect of digitalis?

My thought was microtubule associated proteins but I wasn't sure of the specific

faraz   1557   3 Replies

duddy

Between ionic and covalent (chemical bonding) need help understanding..

Between ionic and covalent (chemical bonding) need help understanding..

Last I took Biology was during high school years. Now I'm getting old so may be some of you students can help me out with this for my school project. Would to get some more insight of the two types of bonds. May be a quick summarize so I can und

rb40gte   2461   3 Replies

karim89

Chromatography identifying an unknown compound?

Chromatography identifying an unknown compound?

what is a practical uses for the process of identifying an unknown compound using chromatography.

jj231   5159   2 Replies

duddy

How do I predict the genotypes produced?

How do I predict the genotypes produced?

Lets say we cross AaBbCcDdEe with AaBbCcDdEe. How many different genotypes will occur?
The answer is 3^5 = 243 genotypes. Where do the 3 and the 5 come from?

I know that AaBbCcDdEe will produce 32 kinds of gametes because 2^5= 32. I

confused_student   35293   6 Replies

confused_student

Which Complex carbohydrate contains only a-1, 4-glycosidic linkages?

Which Complex carbohydrate contains only a-1, 4-glycosidic linkages?

Which Complex carbohydrate contains only a-1, 4-glycosidic linkages?
A) Amylopectin
B) Cellulose
C)Amylose
D) Glycogen
E)Glucose

Which of the following complex carbohydrates is listed with its correct function?

psiu2   19581   9 Replies

nite_n_day

What is a trans-fat and why do think it is harmful? In terms of biology, can you give me some ...

What is a trans-fat and why do think it is harmful? In terms of biology, can you give me some ...

What is a trans-fat and why do think it is harmful? In terms of biology, can you give me some insights for my own knowledge and self-study for my class?

Thanks everyone..

rb40gte   2864   4 Replies

star

Describe two features of the small intestine which help it in the absorption of the products of dige

Describe two features of the small intestine which help it in the absorption of the products of dige

First of all hey, I'm new here. I recently went on yahoo answers and found someone post a link to this site in response to a biology question. I thought i'd check it out. Good site!

I'm a standard grade student in the UK. I

TheShahMaestro   1490   1 Reply

bio_man

orbitals of electrons in Cl

orbitals of electrons in Cl

Which orbitals are occupied by the electrons of Cl?  What is the shape of each orbital you indicate? 

I will put a few of your posters up on Monday in the biology building at the college. thanks

oldcollegelady   1877   2 Replies

bio_man

Duddy! Helpenzie me bitta!

Duddy! Helpenzie me bitta!

This time I'm for real about the cookies. 

Let me make sure I understand.  In the examples discussed we assumed that all the genes were heterozygous.  But let’s talk about if some of the genes are homozygous.  I w

12

confused_student   7679   18 Replies

karim89

What are two good analogies of the relationship between a non-polar covalent bond, a polar covalent ...

What are two good analogies of the relationship between a non-polar covalent bond, a polar covalent ...

What are two good analogies of the relationship between a non-polar covalent bond, a polar covalent bond and an ionic bond?

 

roxana90   4027   1 Reply

bio_man

If they would move spontaneously in one direction, why don’t they quickly come to equilibrium, ...

If they would move spontaneously in one direction, why don’t they quickly come to equilibrium, ...

The cells of your body have Na+-K+-ATPases, which use energy from ATP to pump Na+ out of the cell and K+ into the cell. One result of this is that there is an electrochemical gradient of Na+ ions across the plasma membrane, with more Na+ outside than

roxana90   2107   1 Reply

bio_man

The following table outlines the basic steps in the scientific thinking process. Match the biologica

The following table outlines the basic steps in the scientific thinking process. Match the biologica

1.
The following table outlines the basic steps in the scientific thinking process. Match the biological box activity with its corresponding step.
A. OBSERVING
B. FORMING A HYPOTHESIS
C. TESTING THE HYPOTHESIS
D. ANALYZ

vanessa234   1366   1 Reply

star

The cells that line the small intestine can absorb glucose even though the concentration

The cells that line the small intestine can absorb glucose even though the concentration

The cells that line the small intestine can absorb glucose even though the concentration
inside the cell already exceeds the concentration outside of the cell (in the lumen of the
intestine). The protein that transports this glucose into th

roxana90   1332   1 Reply

sarah!

Drawing a Concept Map help!

Drawing a Concept Map help!

I'm new to concept mapping and my hw question is:

Draw a concept map relating
the structure of water to the following properties:
-hydrogen bonding -polar covalent bonds
-polarity -unequal sharing of electrons
-hig

roxana90   4796   1 Reply

sarah!

What must be done at the molecular level to make these process be spontaneous?

What must be done at the molecular level to make these process be spontaneous?

In order for a process to be spontaneous it must result
in the release of free energy. But there are many processes that occur within the cells
of your body that absorb free energy. Obvious examples are the contraction of
muscle cells

roxana90   1150   1 Reply

sarah!

HELP ON THE PROTEIN ALBUMIN

HELP ON THE PROTEIN ALBUMIN

What (if any) secondary, tertiary, or quaternary?

does it have any special folding?

os it polar or non polar?

thanks!

CloGirl1316   2170   5 Replies

bio_man

What medical advances over the past 100 years do you think have been the most im

What medical advances over the past 100 years do you think have been the most im

What medical advances over the past 100 years do you think have been the most important? Explain your answer. In your response, include how these advances affect you today. 

vanessa234   2789   1 Reply

lewis

Spontaneus

Spontaneus

the cells of your body have Na+-K+-ATPases,
which use energy from ATP to pump Na+ out of the cell and K+ into the cell. One
result of this is that there is an electrochemical gradient of Na+ ions
across the plasma membrane, with more

gh1991   1119   1 Reply

sarah!

Explain protein secondary structure, tertiary structure, and quaternary structure in terms of these ...

Explain protein secondary structure, tertiary structure, and quaternary structure in terms of these ...

Many of the most important interactions in biology involve non-covalent interactions, such as ionic bonds,
hydrogen bonds, hydrophobic interactions, and van der Waals interactions. Explain protein secondary structure, tertiary structure, and qua

roxana90   2891   3 Replies

roxana90

If two single-stranded DNA molecules with complementary sequences are mixed in solution under ...

If two single-stranded DNA molecules with complementary sequences are mixed in solution under ...

If two single-stranded DNA molecules with complementary sequences are mixed
in solution under physiological conditions (as found in a cell), they will base-pair
to form a doubled-stranded molecule. Briefly discuss this process in thermodyna

roxana90   1510   2 Replies

roxana90

Role of non-covalent interactions in the structure of DNA

Role of non-covalent interactions in the structure of DNA

As with proteins, non-covalent interactions play a central role in determining the structure of DNA.
For each type of non-covalent interaction (ionic bonds, hydrogen bonds, hydrophobic interactions, and van der Waals interactions), briefly descr

roxana90   6986   1 Reply

bio_man

Briefly describe the structure of these molecules and why more energy can be extracted from the...

Briefly describe the structure of these molecules and why more energy can be extracted from the...

Your body stores two types of molecules as energy reserves: glycogen and
triglycerides. Of these two types of molecules, much more energy can be extracted
from triglycerides. Why? Briefly describe the structure of these molecules
and w

croxy7205   6017   2 Replies

star

What are the benefits and disadvantages of determinate and indeterminate cell differentiation, and w

What are the benefits and disadvantages of determinate and indeterminate cell differentiation, and w

What are the benefits and disadvantages of determinate and indeterminate cell differentiation, and what developmental animal lines (lineages) exhibit which characteristics?

Briana   2237   2 Replies

karim89

Discuss the benefits and disadvantages of determinate and indeterminate cell differentiation. What d

Discuss the benefits and disadvantages of determinate and indeterminate cell differentiation. What d

For my Bio class we have discussion questions each week. It just so happens that I need help with this weeks question: Discuss the benefits and disadvantages of determinate and indeterminate cell differentiation. What developmental animal lines exhib

bh08   1728   3 Replies

bio_man

help solve quiz 2 :)

help solve quiz 2 :)

____1.  Which of the following is not a descriptive of any fungi?
a.    Saprophytic   b.  decomposer   c. parasitic   d.  autotrophic   e.  heterotrophic


____2.  Most true fungi send out cellular individual

mark1532   8965   8 Replies

star

A consumer eating a producer represents?

A consumer eating a producer represents?

Can you please help me with this? bold for correct answer. Thank you guys so much!

1.   A consumer eating a producer represents?

a.   a transfer of chemical nutrients and energy.
b.   a transfer of chemical nutrients but not a tr

rb40gte   15906   12 Replies

star

Fixation of nirogen in biological and industrial process

Fixation of nirogen in biological and industrial process

Lo guys, im a first year science student, would be grateful for any help on this one but i have a quesition asking me to describe the similarities and differences between biological fixation of nitrogen into ammonia in plant microbes and the industri

Eranu   1780   3 Replies

bio_man

help on quiz 4 :)!!

help on quiz 4 :)!!

__1. Which of the following is NOT true concerning plants?
a. There are at least 295,000 kinds of existing plants.
b. Plants affect the composition of the atmosphere.
c. Almost 750 plant species in the United States alone are now on th

mark1532   19482   9 Replies

mark1532

The bacterium E. coli can take up the disaccharide lactose from its environment and can use it as an ...

The bacterium E. coli can take up the disaccharide lactose from its environment and can use it as an ...

Question #1 Check all that apply.
The bacterium E. coli can take up the disaccharide lactose from its environment and can use it as an energy source. Once it is inside the cell, the lactose molecule can also bind to a protein that binds the bact

milopigums91   2002   1 Reply

bio_man

Which of the following is not a true statement about the scientific method?

Which of the following is not a true statement about the scientific method?

Which of the following is not a true statement about the scientific method?
A. It is a general way of organizing an investigation
B. It is a framework to consider ideas in a repeatable way
C. It begins with observations
D. It does

Rogue2166   11153   4 Replies

Rogue2166

Phenylketonuria

Phenylketonuria

Discuss the enzymatic nature behind PKU. Be specific. Full credit only given to those responses that give specific enzymes and actually biological basis behind disease.

bh08   1390   1 Reply

bio_man

Please help with my Bio homework, I am really no good at Bio!

Please help with my Bio homework, I am really no good at Bio!

Which, if any, of the following is NOT true about allosteric proteins? 
 
A.   they are sensitive to environmental conditions
 
B.   they exist in active and inactive conformations
 
C.   they are acted on by inhibitor

Matty0132   4004   3 Replies

bio_man

What is a Ganglioside?

What is a Ganglioside?

I was linked here from yahoo answers. Let's see how you guys do :-p

-- Question From yahoo answers--
->What is a Ganglioside?
->I would appreciate an answer in plain English. I can't understand the wikipedia artic

someone2841   1936   1 Reply

bio_man

Of the metabolic pathways listed below, which is the only pathway found in all organisms?

Of the metabolic pathways listed below, which is the only pathway found in all organisms?

     Question 1
Of the metabolic pathways listed below, which is the only pathway found in all organisms?

   A.    the citric acid cycle
   B.    fermentation
   C.    the electron transport chain
   D.    cellular respiration
   E.

Matty0132   3650   1 Reply

bio_man

ecology test correction help

ecology test correction help

I desperately need help and i got a really bad grade on this test. For corrections i have to explain whythe answer is right. will someone explain why these answers are right.

1) which of the following statements about light in aquatic envi

flower555   1839   3 Replies

bio_man

Which of the following would be an ultimate cause of the male's cats' response to the female's urina

Which of the following would be an ultimate cause of the male's cats' response to the female's urina

I desperately need help and i got a really bad grade on this test. For corrections i have to explain whythe answer is right. will someone explain why these answers are right.

5) in the development of teretrial biomes, which factor is the m

flower555   1188   1 Reply

bio_man

Bio food extracting and carbohydrates plese help

Bio food extracting and carbohydrates plese help

In cases where several food extracts can match the carbohydrate profile of an unknown solution, suggest differences in composition between the food extracts that could be tested for in order for you to determine which food extract is actually present

amal   1537   2 Replies

amal

Regulation of Aerobic Respiration

Regulation of Aerobic Respiration

Identify if each of the following statements about metabolism is True or False.

 1. Allosteric regulators can either increase or decrease the activity of an enzyme.
2. Feedback inhibitors should go back as far as possible in a pathway

chang190   3258   1 Reply

bio_man