100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Download this complete,fully solved and updated actual exam for CCEA AS Biology Unit One: KEY TERMS £12.27
Add to cart
Quickly navigate to
Preview
  2.  
  3. Oxford University (OX)
  4.  
  5. CCEA

Exam (elaborations)

Download this complete,fully solved and updated actual exam for CCEA AS Biology Unit One: KEY TERMS
 0 purchase

Activation energy The activation energy required for a reaction is reduced by enzymes. Active site The area of the enzyme where the substrate fits. Can be denatured by pH and heat. Complementary to the substrate. Previous Play Next Rewind 10 seconds Move forward 10 seconds Un...

[Show more]

Preview 4 out of 34  pages

Document information

  • July 13, 2024
  • 34
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers

Subjects

Written for

All documents for this subject (19)

Seller

avatar-seller
GUARANTEEDSUCCESS

Reviews received

Content preview

Download this
complete,fully
solved and
updated actual
exam for CCEA
AS Biology Unit
One: KEY TERMS
Activation energy - answer The activation
energy required for a reaction is reduced by
enzymes.


Active site - answer The area of the enzyme
where the substrate fits. Can be denatured by
pH and heat. Complementary to the
substrate.

,Active transport - answer Movement of
molecules against the concentration gradient
(low to high) and requires energy.


Adenine - answer One of the 4 bases in DNA.


Airspace - answer Air spaces in the spongy
mesophyll allows gas exchange in the leaf.


Amylase - answer Makes up 20% of starch.
Consists of -glucose and has 1-4 glycosidic
bonds. Unbranched but spirals into a helix,
held together by hydrogen bonds.


Amylopectin - answer Makes up 80% of
starch. Consists of -glucose and has 1-6
glycosidic bonds which allow it to be easily
hydrolysed. More branched than glycogen.


Anaphase - answer Chromosomes pulled to
opposite poles of the cell.

,Aquaporin - answer Allow water to move into
and out of cells.


Bacteriophage - answer Type of virus that are
commonly called phages, they are non-
cellular, and attack bacterial cells.


Bilayer - answer The phospholipid bilayer
makes up the cell membrane. The phosphate
heads are hydrophilic and face towards the
water, whereas the fatty acid tails are
hydrophobic and face away from the water.


Bivalents - answer When the homologous
chromosomes line up during Prophase 1 in
meiosis.


Calcium - answer Needed for cell walls in
plants and strong bones and teeth in animals.

, Cell cycle - answer The sequence of events
that occur within a cell, eg. G1, S, G2, Mitosis
and Cytokinesis.


Cell wall - answer The cell wall is the outer
layer of the cell in some organisms. Cellulose
in plants and some protocista, Chitin in fungal
cells and peptidoglycan in some bacteria.


Cell plate - answer How plant cells divide to
form daughter cells, a cell plate grows across
the equator of the cell from the centre
outwards. Cellulose is laid down on the plate
to form the cell wall.


Cellulose - answer Made up of -glucose.
Molecules alternate 180 which makes it rigid.
Role = structural. 1-4 glycosidic bonds and
unbranched.


Chiasmata - answer Where the chromosomes
have crossed over during prophase 1.

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller GUARANTEEDSUCCESS. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for £12.27. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

68175 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 15 years now

Start selling
£12.27
  • (0)
Add to cart
Added