Mitochondria are 0.5-1 micrometers long. It CAN be viewed by a light microscope, BUT ONLY at a magnification of x750 or greater, NOT at x400. As everyone else said, chloroplasts are slightly visible, but the nucleus and the vacuoles are completely visible after staining.
-
We need your support!
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
AS Biology P1 MCQs Preparation Thread
- Thread starter Soldier313
- Start date
- Messages
- 958
- Reaction score
- 3,499
- Points
- 253
Hey people could i please urgently get a list of the sizes of all the organelles in a eukaryotic and prokaryotic cells? please help asap if you have this. JazakallahNope, not as far as I know. If you've looked at slides in your school, you'd know the only things you'd see down a plant cell are the nucleus, the chloroplast and probably differentiate between the plasma membrane and the cell wall.
The leaf is actively photosynthesizing, so it is producing a lot of glucose. This dissolves immediately in the water which reduces the water potential.
2.5 cm: diameter of aorta
1.8 cm: diameter of trachea
1.2 cm: diameter of bronchus
2 mm: thickness of aorta
0.01-0.2 mm: diameter of xylem vessels
250 μm: diameter of alveolus
200μm: average length of unicellular organism (e.g. Paramecium)
100 μm: smallest object visible with the eye only
40 μm: average diameter of plant cell
20 μm: average diameter of animal cell
7.5 - 10 μm: diameter of nucleus
5 -10 μm: minimum length of particles that can be trapped by cilia and mucus
7 μm: diameter of human capillary/red blood cell
5 μm: length of chloroplast
2.5 μm: diameter of nucleolus
2 μm: minimum length of particles that settle in alveoli
1-2 μm: width of plant cell wall
0.5-1 μm: average diameter of mitochondria and bacteria
200 nm: smallest object visible with light microscope (magnification of 1500x)
100 nm: length of HIV virus (very large virus)
30 nm: length of virus
20 nm: average diameter of ribosome
7 nm: thickness of membrane
2 nm: diameter of DNA
0.5 nm: smallest object visible with electron microscope
- Messages
- 958
- Reaction score
- 3,499
- Points
- 253
May Allah (SWT) bless you! Thanx so much!
- Messages
- 576
- Reaction score
- 308
- Points
- 73
got it
got it wrong. it is so not between 1um and 10 um
- Messages
- 958
- Reaction score
- 3,499
- Points
- 253
what is the diff btwn centrioles replicating and centrioles moving apart?
- Messages
- 958
- Reaction score
- 3,499
- Points
- 253
what do u mean? where is the error?
- Messages
- 576
- Reaction score
- 308
- Points
- 73
the 1st mcq i guess. the answer was between 1 um to 100 um. i ticked 1um to 10um.
- Messages
- 958
- Reaction score
- 3,499
- Points
- 253
owh i didnt know u were talkin abt the exam paper!!! no discussion b4 24 hrs
- Messages
- 576
- Reaction score
- 308
- Points
- 73
yeah yeah..
Centrioles replicate just before cell division, and they move apart in the beginning of cell division to form spindle fibres
Which one are you talking about?
- Messages
- 958
- Reaction score
- 3,499
- Points
- 253
would someone pls pls label this diagram for me, it is a cross section frm the lungs
- Messages
- 958
- Reaction score
- 3,499
- Points
- 253
so that means they replicate in interphase and move apart in prophase??
XPFMember
XPRS Moderator
- Messages
- 4,555
- Reaction score
- 13,290
- Points
- 523
AoA!!
The er says:
The percentage transfer between the Sun and producers was 1%, between the producers and primary consumers is 10%, between the primary consumers and secondary consumers is 20% and between detritus and decomposers is 80%.
According to the diagram
the Sun and producers was 1%, => W
between the producers and primary consumers is 10%, => Y
between the primary consumers and secondary consumers is 20% => Z
and between detritus and decomposers is 80%.=> X
The er says:
The percentage transfer between the Sun and producers was 1%, between the producers and primary consumers is 10%, between the primary consumers and secondary consumers is 20% and between detritus and decomposers is 80%.
According to the diagram
the Sun and producers was 1%, => W
between the producers and primary consumers is 10%, => Y
between the primary consumers and secondary consumers is 20% => Z
and between detritus and decomposers is 80%.=> X
- Messages
- 958
- Reaction score
- 3,499
- Points
- 253
i think this is hw the diagram should have been....not sure thoughAoA!!
View attachment 12909
The er says:
The percentage transfer between the Sun and producers was 1%, between the producers and primary consumers is 10%, between the primary consumers and secondary consumers is 20% and between detritus and decomposers is 80%.
According to the diagram
the Sun and producers was 1%, => W
between the producers and primary consumers is 10%, => Y
between the primary consumers and secondary consumers is 20% => Z
and between detritus and decomposers is 80%.=> X
pretty much
Big circle in the middle is most likely the alveolus, and the cells around it are probably RBCs. The little black dots are air molecules, I think.
- Messages
- 958
- Reaction score
- 3,499
- Points
- 253
what abt capillaries? they r the ones enclosing the RBC right?