Written by students who passed Immediately available after payment Read online or as PDF Wrong document? Swap it for free 4.6 TrustPilot
logo-home
Document preview thumbnail
Preview 2 out of 14 pages
Exam (elaborations)

Graad 12 Lewenswetenskappe (LW) Maart Vraestel en Memo - 2024 (2)

Document preview thumbnail
Preview 2 out of 14 pages

Graad 12 Lewenswetenskappe Maart Vraestel: Totaal: 75           Tyd:  1uur 30min Inhoud: DNS | Meiose | DNA profieling | Proteïensintese | Down sindroom Hierdie is 'n oefenvraestel met memorandum bedoel om die leerling se kennis te toets, en sal nie dieselfde vraestel wees wat vir die eksamen geskryf word nie NIZ MYN

Content preview

Lewenswetenskappe
Graad 12


Eksaminator: Me N.Harmse
Datum: MAART 2024 Tyd: 1 uur 30 minute
Totaal: 75

AFDELING A
VRAAG 1
1.1 Verskillende opsies word as moontlike antwoorde vir die volgende vrae gegee. Kies die
korrekte antwoord en skryf slegs die letter (A tot D) langs die vraagnommer (1.1.1 tot 1.1.5)
op die FOLIOPAPER neer, bv. 1.1.6 E.


1.1.1 Die vorm van DNS bestaan uit twee stringe wat saamgevoeg is en spiraalvormig gedraai
word.

A. Dubbele heliks.
B. Heliks.
C. Oorerflik
D. DNA


1.1.2 Wie het die Nobelprys ontvang vir die ontdekking van die struktuur van DNS

A Watson en Franklin.
B Franklin en Crick.
C Crick en Wilkins.
D Watson en Crick.




1|Page www.summariessa.co.za Lewenswetenskappe
Graad 12 Maart Vraestel

, 1.1.3 2de stadium van proteïensintese–aminosure kombineer om 'n proteïen te vorm

A. Transkripsie.
B. Vertaling.
C. Proteïensintese.
D. Meiose.


1.1.4 Anti-kodon
A. drie stikstofbasisse een na die ander op mRNA
B. drie stikstofbasisse een na die ander op tRNA
C. drie stikstofbasisse een na die ander op rRNA
D. drie stikstofbasisse een na die ander op tDNA


1.1.5 DNS is ontleed en gevind dat dit 14% T (timien) bevat. Watter persentasie van die
molekule is sitosien?

A. 14%
B. 28%

C. 36%
D. 72%
[5 x 2 = 10]


1.2 Gee die korrekte biologiese term vir elk van die volgende beskrywings.

Skryf slegs die term langs die vraagnommer neer. (1.2.1 tot 1.2.5) op jou FOLIO
VRAESTEL.



1.2.1 Een van die twee identiese stringe van 'n gerepliseerde chromosoom.
1.2.2 'n Paar chromosome van dieselfde vorm, grootte.
1.2.3 Die fase in die selsiklus wanneer DNA-replikasie plaasvind.
1.2.4 Een volledige stel chromosome in 'n sel.
1.2.5 Punt waar twee chromatiede oorvleuel tydens oorkruising.


[5]



2|Page www.summariessa.co.za Lewenswetenskappe
Graad 12 Maart Vraestel

Document information

Schooljaar
200
Uploaded on
April 10, 2024
Number of pages
14
Written in
2023/2024
Type
Exam (elaborations)
Contains
Questions & answers
$3.19

Wrong document? Swap it for free Within 14 days of purchase and before downloading, you can choose a different document. You can simply spend the amount again.
Written by students who passed
Immediately available after payment
Read online or as PDF

Seller avatar
Reputation scores are based on the amount of documents a seller has sold for a fee and the reviews they have received for those documents. There are three levels: Bronze, Silver and Gold. The better the reputation, the more your can rely on the quality of the sellers work.
SummariesSA
4.4
(73)
Sold
712
Followers
194
Items
781
Last sold
17 hours ago


Why students choose Stuvia

Created by fellow students, verified by reviews

Quality you can trust: written by students who passed their tests and reviewed by others who've used these notes.

Didn't get what you expected? Choose another document

No worries! You can instantly pick a different document that better fits what you're looking for.

Pay as you like, start learning right away

No subscription, no commitments. Pay the way you're used to via credit card and download your PDF document instantly.

Student with book image

“Bought, downloaded, and aced it. It really can be that simple.”

Alisha Student

Working on your references?

Create accurate citations in APA, MLA and Harvard with our free citation generator.

Working on your references?

Frequently asked questions