Explanation

Explanation

Explanation

Humans have 22 pairs of autosomes and 1 pair of sex chromosomes.

Chromosome 21 is the smallest autosome in terms of base pairs.

Chromosome 1 is the largest autosome.

Chromosome 23 refers to sex chromosomes (X or Y), not autosomes.

Chromosome 21 is associated with Down syndrome when trisomic.

Last updated question 17-02-2026

Explanation

• Cell membrane contains phospholipids, proteins, and glycoproteins.
• Glycoproteins form a sticky outer layer (glycocalyx).
• This layer slows the movement of molecules across the membrane.
• Glycolipids also reduce diffusion slightly, but less than glycoproteins.
• Glycerol does not affect cell diffusibility significantly.

Last updated question 17-02-2026

Explanation

• Carolus Linnaeus gave the artificial system of classification. 
• He classified plants mainly based on the number and arrangement of stamens.
• known as the "Father of Taxonomy

Last updated question 17-02-2026

Explanation

Lithium (Li) and Magnesium (Mg), Magnesium (Mg) and Aluminium (Al) show a diagonal relationship in the periodic table

Where elements in adjacent groups and periods have similar properties.

Explanation

They have the general formula R−O−R′,

Where R and R′ represent the organyl groups.

Additional information

• R-CO-R: Ketones
• R-OH: Alcohols
• R-CHO: Aldehydes

Last updated question 17-02-2026

Explanation

• Epiphytes grow on other plants.
• They are not parasitic.
• They obtain nutrients from air and rain.
• Common in tropical forests.
• Orchids are common epiphytes.

Explanation

The region in a bacterial cell where the DNA is concentrated is called the nucleoid. 

Structure:

• It is an irregularly shaped region within the cytoplasm 
• Unlike eukaryotic cells, this region is not enclosed by a membrane.

Explanation