• Set Yourself Up For Success Webinar

    October 6, 2021 at 2 PM Eastern/11 AM Pacific
    SDN and Osmosis are teaming up to help you get set up for success this school year! We'll be covering study tips, healthy habits, and meeting mentors.

    Register Now!

  • Funniest Story on the Job Contest Starts Now!

    Contest starts now and ends September 27th. Winner will receive a special user banner and $10 Amazon Gift card!

    JOIN NOW
  • Site Updates Coming Next Week

    Site updates are coming next week on Monday, Wednesday, and Friday. Click the button below to learn more!

    LEARN MORE

embryonic state?

Dencology

Full Member
10+ Year Member
Mar 7, 2008
396
0
0
  1. Pre-Dental
Guys i thought to post these q's here. it is a good review. they have a high chance to coming on your DAT: check them out and post your correct ans here:

1. at what embryonic stage does embryo implant into the uterus?

zygot
16cell
fertilized egg

2. what is the difference b/w animal cell and bacteria cell?


3. which of the following exhibit a situation where molecules are traveling acros their concentration gradient?


a. active transport
b. diffusion
c. faciliated diffusion

4. IF a disease exhibits autosomal recessive characteristics, which of the following situations will NOT occur? (explain your answer for this question)

a. 2 homozygous dominant parents have a boy inherits the disease
b. 2 heterozygote parents have a boys who inherits the disease.
 
Last edited:

chessxwizard

Full Member
10+ Year Member
7+ Year Member
Jul 28, 2007
291
0
151
  1. Pre-Dental
2. Animal cell has histones, has a nucleus, has no plasmids, doesn't have a cell wall, has 80s ribosomes, etc... Bacteria has naked DNA floating around in a nucleoid, has plasmids that have genes for antibiotic resistance and fertility, has a cell wall, has 70s ribosomes... any reasonable science textbook should give you the full list of differences.

3. You mean down their concentration gradient? Both diffusion and facilitated diffusion have molecules go down their concentration gradient, with the latter describing the use of a protein channel to get across the phospholipid bilayer. Active transport occurs with molecules going up their concentration gradient and involves energy expenditure, usually in the form of ATP hydrolysis.

4. d = recessive disease allele. Since it exhibits autosomal recessive, sex does not matter and the progeny must have dd genotype to show the diseased phenotype. The only way to do this is if both parents are carriers of the allele. Thus, a child from 2 homozygous dominant parents cannot have recessive allele (DD x DD = only DD)
 
This thread is more than 12 years old.

Your message may be considered spam for the following reasons:

  1. Your new thread title is very short, and likely is unhelpful.
  2. Your reply is very short and likely does not add anything to the thread.
  3. Your reply is very long and likely does not add anything to the thread.
  4. It is very likely that it does not need any further discussion and thus bumping it serves no purpose.
  5. Your message is mostly quotes or spoilers.
  6. Your reply has occurred very quickly after a previous reply and likely does not add anything to the thread.
  7. This thread is locked.