Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biology [2+9] > [2.1] Basis-Elemental Composition > Flashcards

[2.1] Basis-Elemental Composition Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

What is the % of elements essential to continue healthy life and reproduction?

A

20-25%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the Macro Elements?

A

C|H|O|N
Ca|P|K|S|Na|Cl|Mg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the elements that accounts for 96.3%

A

C|H|O|N

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the trace elements?

A

B|I
Vn|Zn
Cu|Cr|Co
Se|Si|Sn
Mo|Mn
F|Fe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the main elements that accounts for 3.7％?

A

Ca|P|K|S|Na|Cl|Mg
and
Trace

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the 2 main importance of water?

A

1.Vital chemical constituent of living cell
2.Provides a biological medium for all organisms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are 2 main impotances of water based on?

A

Chemical Structure of the water molecule

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Describe a water molecule.

A

Inorganic/Polar/Angular/Vital

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Explain the term ‘Polarity’.

A

Uneven Charge distribution within a molecule

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the charges for O & H?

A

[-] and [+]

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Explain ‘Hydrogen Bonds’

A

Weak attractions between the slightly polar hydrogen atome of one water molecule and the slightly polar oxygen atom of the adjacent water molecule.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What role does Hydrogen Bonds play?

A

Plays a Major role in maintaining all properties of water.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the angle between two hydrogen atoms in a water molecule?

A

104.5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the 4 major properties of water (related to function) to maintain life on earth?

A

1.Cohesive Behaviour
2.Expansion Upon Freezing
3.Ability to Moderate Temp
4.Versatility as a solvent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Explain ‘Cohesion’ & ‘Adhesion’

A
  • Attraction between water molecules due to hydrogen bonding
  • Attraction between water molecules and other substances
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What does Cohesion & Adhesion property result in?

A

Allows water to act as a transport medium

17
Q

Example For Cohesion between water molecules

A

Water & Dissolved substances such as minerals and nutrients transport across vascular tissues,xylem and phloem against gravity

18
Q

Example For Adhesion between water molecules

A

Between Water and Cell Wall also helps in conduction of water and dissolved substances.

19
Q

Example For High Surface Tension of water

A

Upper surface water molecules are attracted by lower surface water molecules to form a water film.

20
Q

What are the organisms benefitted by High Surface Tension?

A

Small Insects - Water Skaters

21
Q

What can you say about ability to moderate temp. ?

A

Water can absorb or release a relatively high amount of heat energy by a slight change in its own temp.

22
Q

What are the functions of water due to high heat of vaporization?

A

With min. loss of water an organism can release much heat energy
* Body Surface-Remains Cool
* Prevent from Over-Heating

23
Q

What are the functions of water due to high specific heat?

A

Water will act as a thermal buffer during temp. fluctuations on earth

24
Q

What are the advantages of evaporation and transpiration?

A
  • Evaporation of sweat from human skin helps to maintain the human body temp at constant level.
  • Transpiration in plants keeps the plant body surface as a cool surface and prevent from becoming too warm in the sunlight
25
Q

What happens when temperature of water falls below 4°C ?
1. How does it affect density of water?

A

Begins to freeze and forms a crystalline lattice
* Water has Max. Density at 4c

26
Q

How does Expansion Upon Freezing become an Important Property Of Water?

A

In Polar Regions,Organisms in aquatic bodies can survive during winter

27
Q

How is Versatility given to water ?

A

Due to Polarity

28
Q

What does solubility depend on?

A

Depends on Polarity and NOT Ionic Nature

29
Q

Give Examples For
1. Polar Molecules
2. Ionic Compounds
3. Polar/Ionic

A
  1. Glucose
  2. NaCl
  3. Lysozymes
30
Q

What Molecules the ability to dissolve in water

A

Both Polar & Ionic

Biology [2+9] (27 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions