Examen
Questions and answers for biological molecules
- Grado
- Institución
Handpicked high yield questions to test your knowledge of biological molecules from an A* student
[Mostrar más]Vista previa 2 fuera de 15 páginas
Vista previa 2 fuera de 15 páginas
Añadir al carrito
Añadir al carrito
Vendedor
Seguir
tatwal2006
Vista previa del contenido
Q1.The diagram below shows the structure of molecules found in organisms.
(a) Complete the table below by putting the correct letter, A, B, C or D, in the box next
to each statement. Each letter may be used once, more than once, or not at all.
Letter Statement
is a monomer in an enzyme’s active site
is a monomer in cellulose
is produced during photosynthesis and respiration
forms a polymer that gives a positive result with a
biuret test
(4)
(b) Raffinose is a trisaccharide of three monosaccharides: galactose, glucose and
fructose. The chemical formulae of these monosaccharides are:
• galactose = C6H12O6
• glucose = C6H12O6
• fructose = C6H12O6
Give the number of carbon atoms, hydrogen atoms and oxygen atoms in a molecule
of raffinose.
Number of carbon atoms _______________
Number of hydrogen atoms _______________
Number of oxygen atoms _______________
(1)
(c) A biochemical test for reducing sugar produces a negative result with raffinose
solution.
Page 1 of 15
, Describe a biochemical test to show that raffinose solution contains a non-reducing
sugar.
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
(3)
(Total 8 marks)
Q2.
(a) The table shows some substances found in cells. Complete the table to show the
properties of these substances. Put a tick in the box if the statement is correct.
Substance
Statement DNA
Starch Glycogen Deoxyribose
helicase
Substance contains only
the elements carbon,
hydrogen and oxygen
Substance is made from
amino acid monomers
Substance is found in
both animal cells and
plant cells
(4)
(b) The diagram shows two molecules of β-glucose.
On the diagram, draw a box around the atoms that are removed when the two β-
glucose molecules are joined by condensation.
(2)
Page 2 of 15
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 tatwal2006. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for 3,70 €. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
45,681 summaries were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now