Cambridge International AS and A Level Biology Coursebook with CD-ROM
Complete and concise notes on Nucleic acid and protein synthesis for A Level Biology (9700) with supporting syllabus points referenced to respective content.
AS & A Level Biology 9700 : Respiration, Immunity and Infectious Diseases
Todos para este libro de texto (114)
Escuela, estudio y materia
Kolej Yayasan UEM
9700
Todos documentos para esta materia (5)
Vendedor
Seguir
puterihazmyr
Vista previa del contenido
🧫
Chpt 5: The Mitotic Cell Cycle
(Cell cycle and nuclear division)
Chromosomes
Describe the structure of a chromosome
Structures:
Chpt 5: The Mitotic Cell Cycle (Cell cycle and nuclear division) 1
, 1. Telomeres: A region of repetitive nucleotide sequences at each end of a
chromatid, which:
a. Allows chromosome to replicate properly during cell division: during
replication, chromosome is shortened (DNA is lost) - prevents loss of
entire genes
b. Help organise chromosomes in cells
c. Prevents the chromosomes from unravelling and sticking to other
chromosomes, by acting as a cap/aglet
2. Chromatids: Identical strands of DNA, bound by centromere (1 chromatid = 1
DNA molecule)
a. Sister chromatids: genetically identical chromatids that make up the stx
of the chromosome
3. Kinetochore: the protein structure on chromatids, next to centromere,
containing a binding site, site for the attachment of spindle fiber
4. Genes: small sections of DNA that code for a particular protein and give
rise to a specific feature
DNA structure is maintained by histone proteins
5. Centromere: a narrow region containing no DNA which binds the 2 sister
chromatids together
Cell cycle
Outline the stages of the mitotic cell cycle
1. Interphase: cell growth
Longest phase in the cell cycle
Longest phase: G1
Where cell grows to normal size after division and carries out normal
functions - making proteins
All genetic material is in the form of chromatins
Chpt 5: The Mitotic Cell Cycle (Cell cycle and nuclear division) 2
Los beneficios de comprar resúmenes en Stuvia estan en línea:
Garantiza la calidad de los comentarios
Compradores de Stuvia evaluaron más de 700.000 resúmenes. Así estas seguro que compras los mejores documentos!
Compra fácil y rápido
Puedes pagar rápidamente y en una vez con iDeal, tarjeta de crédito o con tu crédito de Stuvia. Sin tener que hacerte miembro.
Enfócate en lo más importante
Tus compañeros escriben los resúmenes. Por eso tienes la seguridad que tienes un resumen actual y confiable.
Así llegas a la conclusión rapidamente!
Preguntas frecuentes
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.
100% de satisfacción garantizada: ¿Cómo funciona?
Nuestra garantía de satisfacción le asegura que siempre encontrará un documento de estudio a tu medida. Tu rellenas un formulario y nuestro equipo de atención al cliente se encarga del resto.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller puterihazmyr. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for $7.99. You're not tied to anything after your purchase.