Math lit•Life Science tutorial

Matric 2025

Nayi Update on MATH.LIT

DATA HANDLING

1. SUMMARISING DATA
OBJECTIVES

At the end of this section, you must be able to do the following:

• Calculate the mean.
• Calculate the median.
• Identify the mode for arranged data.
• Calculate the range.
• Analyse measures of central tendency and make deduction about the
trends in the data.

2.Summary

2.1Summarising Data

Once the collected data has been classified and organised, it is important to
summarise the data, in order to provide additional information regarding the
trends of the data set.

3.Measures of Central Tendency

There are 3 measures of central tendency
- Mean
-Median
- Mode

1.MEAN

-the formula used:

Mean = Sum of values DEVIDE.BY number of values.

-It can be only be calculated if the data set is numerical

2.MEDIAN

-All data values must be arranged in ascending order.
-it is a middle value.

3. MODE

-it the number that appears the most

Sinama DNA ayi.2

1.Nuclear DNA
-itholakala in both Plants and Animals
-inside the Nucleus

2.ExtraNuclearDNA
-extra means outside, therefore le DNA siyithola kuphela outside the Nucleus AND ahlukene kabili sine mtDNA.and.cDNA

(a).mtDNA
-(Mitochondrial DNA) itholakala only in Animals.
-ku.MITOCHONDRIA

(b).cDNA
-(Chloroplastic DNA) itholakala only in plant's
-ku.CHLOROPLAST

DNA CODE OF LIFE

Lana yazi ukuthii sikhuluma ngama NUCLEIC.ACIDS ayi.2
okuyi DNA kanye ne RNA.

Before ungene in details.yazi kuqala ukuthii yini i.Nucleotide

1. NUCLEOTIDE : are the building block/monomer of Nucleic.acids (DNA and RNA).

lesi structure sakhiwe ama portion aw.3 ( phosphate,Suger, Nitrogenous Base).

So.we have 5 type of N.B
1.Adenine (A)
2.Thymine (T)
3.Guanine (G)
4.Cytosine (C)
5. Uracil (U)

ubona ngani ukuthii lesi structure si belong.kuphi ingabe kwa RNA.noma.DNA
*Suger, Shape, strand,NB, Bons, Lengths.

DNA

*Suger=Deoxyribose
*Shape=Double helix
*Strand=Two strand
*NB=(T)
*Bond=Weak hydrogen bonds
*Length=Long

RNA

*Suger= Ribose suger
........