Presentation
Biology Paper 2 clarification
- Course
- Institution
This document gives the topics within paper 2 and explains them in its simplest form with key facts. Very useful to remember key facts and the basics of each topic.
[Show more]
Seller
Follow
Fahmed
Available practice questions
DNA AND GENES
Flashcards
11 Flashcards
Free
0 sales
Flashcards
11 Flashcards
Free
0 sales
Some examples from this set of practice questions
1.
DNA + GENES QUICK DESCRIPTION
Answer: - A gene is a small section of DNA on a chromosome -(smallest to largest): gene - DNA - chromosome - nucleus - cells -DNA consists of two strands (each strand is a polymer). Two strands wrap in a double helix structure
2.
What is a Polymer?
Answer: A polymer means that each strand is made by joining together other smaller molecules
3.
DNA - ZOOMED DESCRIPTION
Answer: DNA is actually a polymer as they are made up of little units called Monomers Each Monomer is called a nucleotide Nucleotide: any of a group of molecules that, when linked together, form the building blocks of DNA
4.
4 different bases of DNA
Answer: adenine (A) thymine (T) cytosine (C) guanine (G) *only complementary bases can pair so: A and T C and G
5.
GENE
Answer: a gene: a particular sequence of bases codes for protein -Each group of 3 bases is called a triplet and codes for a specific amino acids (i.e. \\\'ACT\\\')
6.
Main uses of proteins
Answer: Main uses of protein: -enzymes ~ act as biological catalysts -hormones -Structural proteins
Content preview
BIOLOGYTopics:
-DNA AND GENES
-RESPONDING TO STIMULI
-BIODIVERSITY
-SEXUAL REPRODUCTION (MEIOSIS)
-INHERITANCE (punnet square)
-CLASSIFYING ORGANISMS (BIOMES)
-DEFORESTATION
DNA AND GENES
-Chromosomes are found in the nucleus of cells. Chromosomes contain the molecule DNA.
1
, BIOLOGY
-Each human body cell contains 46 chromosomes. Humans have 23 pairs of chromosomes (23 from mother, 23 from
father).
-DNA consists of two strands (each strand is a polymer). The two strands wrap around each other to form a double helix.
-DNA is found in chromosomes.
-A gene is a small section of DNA on a chromosome.
-Proteins are made by joining together amino acids. Each gene encodes for a specific sequence of amino acids to make a
specific protein.
-The genome is the entire genetic material of an organism. So, the human genome is the entire genetic material that
makes a human.
-Understanding the genome will help us to search for genes that are linked to a disease (e.g. genes that increase the risk of
developing cancer or Alzheimer’s disease).
-Understanding the human genome will help us to understand and treat inherited disorders e.g. cystic fibrosis.
-We can use the human genome to trace human migration patterns from the past.
DNA AND GENES – CLARIFICATION
-Largest to smallest: CELLS → NUCLEUS → Chromosome → DNA → Gene
-“DNA consists of 2 strands (each strand is a polymer).”Polymer means that each strand is made by joining together other smaller molecules.
2
The benefits of buying summaries with Stuvia:
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
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
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 Fahmed. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $0.00. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
80189 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now