IB DP Biology: HL复习笔记7.1.4 DNA Sequencing
DNA Sequencing Application: Use of nucleotides containing dideoxyribonucleic acid to stop DNA replication in preparation of samples for base sequencing DNA sequencing allows for the nucleotide base...
IB DP Biology: HL复习笔记7.1.3 Non-coding DNA
Non-coding Regions of DNA DNA molecules are very long but only certain regions code for the production of polypeptides These are called coding sequences In humans only 1.5% of the genome contains c...
IB DP Biology: HL复习笔记7.1.2 Mechanism of DNA Replication
Leading Strand & Lagging Strand Double-stranded DNA consists of two antiparallel strands (oriented in opposite directions) During DNA replication, the two strands are ‘unzipped’ and DNA polymer...
IB DP Biology: HL复习笔记7.1.1 DNA Structure
Nucleosomes Unlike most prokaryotic DNA which is referred to as ‘naked’, eukaryotic nuclear DNA is associated with proteins called histones (to form chromatin) Histones package the DNA into structu...
IB DP Biology: HL复习笔记6.6.6 Skills: Reproduction Diagrams
Male & Female Diagrams You should be able to annotate diagrams of the female and male reproductive systems to show the names of the different structures You should also be able to recall the fu...
IB DP Biology: HL复习笔记6.6.5 Reproduction: Sex Determination in Females
Oestrogen & Progesterone During early development an embryo develops embryonic gonads that will either become ovaries in females or testes in males The factor that determines whether the embryo...
IB DP Biology: HL复习笔记6.6.4 Reproduction: Sex Determination in Males
SRY Gene In sexual reproduction in humans, a sperm from a male fuses with, or fertilises, an egg from a female to form a zygote, which then develops into an embryo To begin with the embryo develops...
IB DP Biology: HL复习笔记6.6.3 Reproduction: Background
William Harvey & Sexual Reproduction in Deer William Harvey (1578 - 1657) was an English physician who contributed greatly to our understanding of anatomy and physiology He is mainly remembered...
IB DP Biology: HL复习笔记6.6.2 Hormones Continued
Leptin Leptin is a hormone that is secreted by fat storage cells known as adipose cells The concentration of leptin in the blood is controlled by the amount of adipose tissue in the body As we eat ...
