Question about cell membranes and oocyte development

Debate and discussion of any biological questions not pertaining to a particular topic.
New forum link: https://forum.biologyonline.com/index/c ... discussion

Moderators: honeev, Leonid, amiradm, BioTeam

The new Biology Online has arrived!

We are very pleased to announce the website's new design and features. As a biology website pioneer in 2001, it has grown to become the world's most comprehensive online database for biology terms and topics. Thus, we would like to invite you to take part in this significant milestone by checking out these latest features from Biology Online.

Biology Dictionary

The largest online biology dictionary with over 70,000 biology terms! Learn various topics, concepts, and principles in biology. Start by searching here.

Biology Articles

Get the latest biology news, insights, trends and discoveries in biology and other related research fields. We have over 5,000 articles you can choose from.

Biology Tutorials

From the basics to the more advanced lessons, our tutorials will help you learn various topics in biology. Browse from over 100 free biology lessons here.

New Biology Forum

We hold one of the largest discussion boards in biology online! Join our community by signing up here or log in here if you already registered with us before.

Thank you and we hope you will join us as the site continues to grow by leaps and bounds.

Sincerely,
Biology Online Team

Locked
Ibseey
Garter
Garter
Posts: 2
Joined: Mon May 02, 2016 3:36 pm

Question about cell membranes and oocyte development

Post by Ibseey » Mon May 02, 2016 7:43 pm

First questions is about cell membrane and what it consits off.

The questions are
A. Is made of cellulose
B. Consists of lipid bilayer and proteins
C. Consists of glycolipids and protein bilayer
D. is permeable to water
E. may contain pores

Answers are.
1. A and B are valid.
2. C and D are valid.
3. C and E are valid.
4. D and E are valid.
5. C and D and E are valid.
6. Only C is valid.

I know it does not consist of cellulose. That removes answer A and option 1.

I know that cell membrain contain pores, it's where the transmembrane proteins are. So option E is valid.

Is permeable to water? Yes, the cell membrane has a hydrofilic head with two hydrophobic heads. Also diffusion through osmosis. So water can go through, kinda. That makes D valid.


Now where the tricky part is. I know the cell membrane contains a lipid bilayer and proteins, that makes B valid.

But if B, D and E are valid I must make something wrong or is the test wrong? Because there is no such coice! Closest choice is C,D,E but that is wrong, yes the membrane consits of glycolipids but no protein bilayer.

Have I misunderstood this question or is the test wrong?



Question 2.

Oocyte development includes:
A. degeneration of follicle
B. arrest in meiotic prophase
C. stage of primordial follicle
D. arrest in meiotic metaphase II
E. stage of secondary follicle

Answers are:

1 A, B are valid
2 A, B, C, D are valid
3 B, D are valid
4 C, D are valid
5 B, C, D, E are valid
6 all answers are valid

I have read about the oozyte development in the ovum, and something about release of follicle, but I have no idea how to answer this question!

claudepa
Death Adder
Death Adder
Posts: 81
Joined: Tue Nov 03, 2015 12:43 pm

Post by claudepa » Tue May 03, 2016 9:40 am

Hi
Question 1: The right answer is D and E. B alone is OK but is not, as alone, in the possible answers. So the test is not wrong.

Locked