Read the following instructions carefully before answering the questions.
1. Answer ALL the questions.
2. Write ALL the answers in your ANSWER BOOK.
3. Start the answer to EACH question at the top of a NEW page
4. Number the answers correctly according to the numbering system
used in this question paper.
5. Present your answers according to the instructions of each question.
6. Do ALL drawings in pencil and label them in blue or black ink.
7. Draw diagrams, tables or flow charts only when asked to do so.
8. The diagrams in this question paper are NOT necessarily drawn to scale.
9. Do NOT use graph paper.
10. You may use a non-programmable calculator, protractor and a
compass where necessary.
11. Write neatly and legibly.
Copyright Please turn
reserved over
, (EC/NOVEMBER 2023) LIFE SCIENCES P1 3
SECTION A
QUESTION 1
1.1 Various options are given as possible answers to the following
questions. Choose the answer and write only the letter (A–D) next to
the question numbers (1.1.1 to 1.1.10) in the ANSWER BOOK, for
example 1.1.11 D.
1.1.1 During anaerobic respiration in animals, the pyruvic acid is converted
to …
A ethyl alcohol.
B lactic acid.
C hydrochloric
acid. D acetic
acid.
1.1.2 Which ONE of the following represents a metabolic waste
excreted by the lungs?
A Urea
B Ammonia
C Carbon
dioxide D
Uric acid
1.1.3 Which ONE of the following pathways correctly represents
air movement in the lungs?
A Alveolus bronchiole trachea bronchus B
Bronchiole trachea bronchus alveolus C
Trachea bronchus bronchiole alveolus D
Trachea bronchiole bronchus alveolus
1.1.4 The blood vessel that transports absorbed nutrients from the small
intestine to the liver is the …
A hepatic vein.
B hepatic portal
vein. C inferior
vena cava. D renal
vein.
1.1.5 The gas released during photosynthesis is …
A carbon
dioxide. B
oxygen.
C hydrogen.
D ozone.
Copyright Please turn
reserved over
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
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.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Schoolflix. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.00. You're not tied to anything after your purchase.