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Explain how mRNA is formed. (6 marks)

DNA helicase breaks the hydrogen bonds between the base pairs in the double-stranded DNA. RNA nucleotides then line up beside their corresponding nitrogenous base (A-T, C-G) along the template strand of t...

LN
Answered by Laura N. Biology tutor
8794 Views

How are B cells activated?

A phagocyte will engulf the pathogen by endocytosis. The vesicle containing the pathogen will fuse with the lysosome where it is degraded by hydrolytic enzymes. Short peptides of the pathogen will be disp...

EB
Answered by Eleanor B. Biology tutor
4124 Views

Derive an expression to show that for satellites in a circular orbit T² ∝ r ³ where T is the period of orbit and r is the radius of the orbit.

For an object to stay in a steady orbit; F=mv2/r where: F is the force on the object towards the centre of the orbit, m is the mass of the object, v is the radial velocity of the object, and r ...

JM
Answered by James M. Physics tutor
5958 Views

Discuss the possible effects that mutation can have on the structure and function of a protein (3 marks)

Mutation can result in changes to a proteins primary, secondary and tertiary structure. Deletion mutations and mutations resulting in a new stop codon can result in the <...

EM
Answered by Emma M. Biology tutor
7098 Views

Lee este texto de la novela de José Martí, Amistad funesta. Complétalo, escogiendo palabras de la lista A – P en la página siguiente. Escribe la letra de la palabra en la casilla.

A K I G H O L J B P 
I will show the text during the lesson.

KD
Answered by Kate D. Spanish tutor
2008 Views

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