MYTUTOR SUBJECT ANSWERS

574 views

Describe the roles of DNA and RNA in determining the sequence of amino acids in proteins.

The sequence of bases (a gene) on DNA determines the order of amino acids that come together to form a polypeptide (protein) chain.

The DNA is 'unzipped' by enzymes called Helicases. This allows a single strand of DNA to be copied (transcription) to form a molecule of messenger RNA (mRNA).

The mRNA then leaves the nucleus through the nuclear pores and enters the cytoplasm.

In the cytoplasm the mRNA associates with a ribosome.

Free amino acids within the cytoplasm are brought together in the correct order (determined by the sequence of the mRNA) to form a polypeptide chain (protein).

Aaron H. Mentoring -Medical School Preparation- tutor, Mentoring -Per...

2 years ago

Answered by Aaron, an A Level Human Biology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

18 SUBJECT SPECIALISTS

£20 /hr

Tashi C.

Degree: Medicine MBCHB (Bachelors) - Manchester University

Subjects offered:Human Biology, Biology+ 1 more

Human Biology
Biology
-Medical School Preparation-

“Hi! I'm Tashi, a 2nd-year medical student at the University of Manchester. I offer tuition for Biology and Human Biology at A-level and GCSE. ”

£20 /hr

Mollie W.

Degree: Natural Sciences (Bachelors) - Bath University

Subjects offered:Human Biology, Science+ 4 more

Human Biology
Science
Maths
Further Mathematics
Chemistry
Biology

“I am a final year Natural Sciences student with a keen interest in science, problem solving and sport.”

£22 /hr

Naomi S.

Degree: Medicine (Bachelors) - Trinity College Dublin University

Subjects offered:Human Biology, Music+ 4 more

Human Biology
Music
Maths
Chemistry
Biology
-Medical School Preparation-

“*Available to teach exam revision sessions immediately.* I'm a medical student at Trinity College Dublin. ”

About the author

£22 /hr

Aaron H.

Degree: Graduate Entry Medicine (MB ChB) (Bachelors) - Bristol University

Subjects offered:Human Biology, -Personal Statements-+ 1 more

Human Biology
-Personal Statements-
-Medical School Preparation-

“A graduate entry medical student with a wealth of teaching experience who is committed to ensuring each student can achieve their potential.”

You may also like...

Posts by Aaron

Describe the effect of calcium ions on tropomyosin and actin in skeletal muscle.

Describe the roles of DNA and RNA in determining the sequence of amino acids in proteins.

Explain how voltage-gated sodium ion channels on the membranes of neurones generate an action potential.

People with AF often also have narrowing of the valve between the left atrium and the left ventricle. This causes the wall of the left atrium to become thicker. Suggest why.

Other A Level Human Biology questions

People get vitamins mainly from the foods they eat or from vitamin tablets. Give a different way in which people get some vitamin K.

Which cells are involved with innate and adaptive immunity?

Why is thermoregulation important?

What is the role of a vitamin in the body?

View A Level Human Biology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok