Grade 12 Life Sciences (LS) March Paper and Memo - 2024 (2)
10 views 0 purchase
Course
Life Sciences
Institution
12th Grade
Grade 12 Life Sciences March Paper and Memo:
Total: 75 Marks. Time: 1hour 30min
Contents:
DNA | Meiosis | DNA profiling | Protein synthesis | Down syndrome
This is a practice paper with memorandum meant to test the student's knowledge, and will not be the same paper writ...
Examiner: Ms N.Harmse
Date: MARCH 2024 Time: 1 hour 30 minutes
Total: 75
SECTION A
QUESTION 1
1.1 Different options are given as possible answers for the following questions. Choose the
correct answer and write only the letter (A to D) next to the question number (1.1.1 to 1.1.5)
on the FOLIO PAPER e.g. 1.1.6 E.
1.1.1 The shape of DNA consists of two strands joined together and twisted spirally.
A. Double helix.
B. Helix.
C. Hereditary
D. DNA
1.1.2 Who received the Nobel Prize for the discovery of the structure of DNA
A Watson and Franklin.
B Franklin and Crick.
C Crick and Wilkins.
D Watson and Crick.
1|Page www.summariessa.co.za Life Sciences
Grade 12 March Paper
, 1.1.3 2nd stage of protein synthesis – amino acids combines to form a protein
A. Transcription.
B. Translation.
C. Protein synthesis.
D. Meiosis.
1.1.4 Anti-codon
A. three nitrogenous bases one after the other on mRNA
B. three nitrogenous bases one after the other on tRNA
C. three nitrogenous bases one after the other on rRNA
D. three nitrogenous bases one after the other on tDNA
1.1.5 DNA was analysed and found to contain 14% T (thymine). What percentage of the
molecule is cytosine?
A. 14%
B. 28%
C. 36%
D. 72%
[5 x 2 = 10]
1.2 Give the correct biological term for each of the following descriptions.
Write down only the term next to the question number. (1.2.1 to 1.2.5) on your FOLIO
PAPER.
1.2.1 One of the two identical strands of a replicated chromosome.
1.2.2 A pair of chromosomes of the same shape, size.
1.2.3 The phase in the cell cycle when DNA replication occurs.
1.2.4 One complete sets of chromosomes in a cell.
1.2.5 Point where two chromatids overlap during crossing over.
[5]
2|Page www.summariessa.co.za Life Sciences
Grade 12 March Paper
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 SummariesSA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $2.95. You're not tied to anything after your purchase.
