Tahsili Biology

Question 1

What is the function of mitochondria in a cell?

Accepted Answer

Cellular respiration — producing ATP (energy) through oxidative phosphorylation

Answer

Protein synthesis

Answer

Photosynthesis

Answer

Cell division

Question 2

What is the complementary DNA strand for the sequence 5'-ATCGGA-3'?

Accepted Answer

3'-TAGCCT-5'

Answer

3'-ATCGGA-5'

Answer

5'-TAGCCT-3'

Answer

3'-UAGCCU-5'

Question 3

What is the role of ribosomes in protein synthesis?

Accepted Answer

Reading mRNA and assembling amino acids into proteins (translation)

Answer

Storing genetic information

Answer

Transcribing DNA to RNA

Answer

Packaging proteins for export

Question 4

What is meiosis and what is its significance?

Accepted Answer

Cell division producing four genetically unique haploid gametes, enabling sexual reproduction and genetic diversity

Answer

Cell division producing identical cells

Answer

Cell growth without division

Answer

DNA replication only

Question 5

What is the difference between genotype and phenotype?

Accepted Answer

Genotype is the genetic makeup (alleles); phenotype is the observable physical characteristics

Answer

They are the same thing

Answer

Genotype is appearance; phenotype is DNA

Answer

Genotype applies to plants; phenotype to animals

Question 6

What is the process of photosynthesis?

Accepted Answer

Converting light energy, CO₂, and H₂O into glucose and O₂ using chlorophyll

Answer

Breaking down glucose for energy

Answer

Absorbing oxygen and releasing carbon dioxide

Answer

Converting proteins into carbohydrates