- #1
pamplemousse
- 1
- 0
Hi guys,
Some background : I'm in the early stages of my first semester of High School Biology and I'm already having some problems coming to terms with the basics. Our original teacher was in car accident over break so we're stuck with a sub, who's a spanish teacher and completely hopeless. It wouldn't be that bad, but someone ordered the wrong textbooks so while we're waiting for the correct ones to arrive we've been using printouts from various sources and they're totally inadequate for what we're expected to do. </end inane rant>
I've searched around and tried to fill in the gaps where I can before coming here (your search feature was very useful, thanks!), but after more time than I would have thought possible I decided it was time to swallow my pride and ask about the last of the things I don't understand. So I was hoping someone could look at a couple of things I still need to answer and walk me through them/correct my thinking where need be? Thanks **so** much for any help.
+ Match the following 25 substances with the correct transport method needed to get these molecules into a cell.
2) glucose
3) sucrose (against concentration gradient)
8) calcium ion
21) droplet of liquid
The options left (provided I didn't screw up one of the others) are: -
through a transport membrane
through a transport membrane
diffusion across the liquid bilayer
by a carrier protein
I currently have it as:
glucose = diffusion across the liquid bilayer
sucrose = through a transport membrane
calcium ion = by a carrier protein
droplet of liquid = through a transport membrane
How far off am I?
------
+ The second is:
Place the following events in animal cell replication in order: -
a)Re-formation of nuclear envelope
b)Duplication of centromere
c)Separation of sister chromatids
d)Elongation of the
e)Decondenstion of chromosomes
f) Attachment of microtubules to centromere region
g)spindleCondensation of chromosomes
h)Pinching of cell into two
i)Alignment of chromosomes on the spindle equator
j)Separation of centromeres
k)Breakdown of nuclear envelope
After digging around I ended up with this:
→Condensation of chromosomes
→ Breakdown of nuclear envelope
→ Attachment of microtubules to centromere region
→ Alignment of chromosomes on the spindle equator
→ Separation of centromeres
→ Elongation of the spindle
→ Separation of sister chromatids
→ Decondenstion of chromosomes
→ Beginning of the re-formation of nuclear envelope
→ Pinching of cell into two
The majority of this is just based off what I can gather from the Internet (after searching longer than I'd admit too) so as you can see, I seriously need help. I understand the basics of mitosis and the phases the cell goes through, but the majority of these specific events weren't even eluded to in the information we were given, like when does centromere duplicate? Is this done when the chromosomes start to replicate? If someone could explain when these events occur and how they react in relation to each other I would be so beyond grateful.
((I was unsure about putting the questions in separate threads, sorry if having them in together was the wrong thing to do.))
Some background : I'm in the early stages of my first semester of High School Biology and I'm already having some problems coming to terms with the basics. Our original teacher was in car accident over break so we're stuck with a sub, who's a spanish teacher and completely hopeless. It wouldn't be that bad, but someone ordered the wrong textbooks so while we're waiting for the correct ones to arrive we've been using printouts from various sources and they're totally inadequate for what we're expected to do. </end inane rant>
I've searched around and tried to fill in the gaps where I can before coming here (your search feature was very useful, thanks!), but after more time than I would have thought possible I decided it was time to swallow my pride and ask about the last of the things I don't understand. So I was hoping someone could look at a couple of things I still need to answer and walk me through them/correct my thinking where need be? Thanks **so** much for any help.
+ Match the following 25 substances with the correct transport method needed to get these molecules into a cell.
2) glucose
3) sucrose (against concentration gradient)
8) calcium ion
21) droplet of liquid
The options left (provided I didn't screw up one of the others) are: -
through a transport membrane
through a transport membrane
diffusion across the liquid bilayer
by a carrier protein
I currently have it as:
glucose = diffusion across the liquid bilayer
sucrose = through a transport membrane
calcium ion = by a carrier protein
droplet of liquid = through a transport membrane
How far off am I?
------
+ The second is:
Place the following events in animal cell replication in order: -
a)Re-formation of nuclear envelope
b)Duplication of centromere
c)Separation of sister chromatids
d)Elongation of the
e)Decondenstion of chromosomes
f) Attachment of microtubules to centromere region
g)spindleCondensation of chromosomes
h)Pinching of cell into two
i)Alignment of chromosomes on the spindle equator
j)Separation of centromeres
k)Breakdown of nuclear envelope
After digging around I ended up with this:
→Condensation of chromosomes
→ Breakdown of nuclear envelope
→ Attachment of microtubules to centromere region
→ Alignment of chromosomes on the spindle equator
→ Separation of centromeres
→ Elongation of the spindle
→ Separation of sister chromatids
→ Decondenstion of chromosomes
→ Beginning of the re-formation of nuclear envelope
→ Pinching of cell into two
The majority of this is just based off what I can gather from the Internet (after searching longer than I'd admit too) so as you can see, I seriously need help. I understand the basics of mitosis and the phases the cell goes through, but the majority of these specific events weren't even eluded to in the information we were given, like when does centromere duplicate? Is this done when the chromosomes start to replicate? If someone could explain when these events occur and how they react in relation to each other I would be so beyond grateful.
((I was unsure about putting the questions in separate threads, sorry if having them in together was the wrong thing to do.))