Q: Give two examples of Single celled organisms.

Single-celled (unicellular) organisms perform all life functions within a single cell; examples include Amoeba proteus and Paramecium caudatum (protozoa), or Escherichia coli (bacterium) and Saccharomyces cerevisiae (yeast).

Q: Write the function of protein.

Proteins perform diverse essential functions in living organisms, including catalysis, structural support, transport, signaling, defense, and regulation of gene expression.

Q: What is objective of the course?

The objective of the Biology for Engineers course is to equip engineering students with fundamental biological knowledge needed to understand, interface with, and design systems that interact with living organisms.

Question 1

Define Brownian.

Accepted Answer

Brownian motion is the random, continuous, erratic movement of small particles suspended in a fluid, caused by unequal bombardment by surrounding thermally agitated molecules.

Question 2

What do you understand by the concept of allele?

Accepted Answer

An allele is one of two or more alternative forms of a gene occupying the same locus on homologous chromosomes, contributing to the variation in phenotypic traits.

Question 3

Define cellularity.

Accepted Answer

Cellularity refers to the fundamental property of living organisms being composed of cells, which are the basic structural and functional units of life.

Question 4

What are monomeric units?

Accepted Answer

Monomeric units are the small, repeating molecular building blocks that are linked together by covalent bonds (polymerization) to form large polymeric biomolecules.

Question 5

What is an Enzyme?

Accepted Answer

An enzyme is a biological catalyst, almost always a protein, that accelerates chemical reactions in living cells without being consumed or permanently altered in the process.

Question 6

Mention the importance of gene.

Accepted Answer

A gene is the fundamental unit of heredity; it carries genetic information encoded in DNA that directs the synthesis of proteins and ultimately determines an organism's traits.

Question 7

What is spontaneity?

Accepted Answer

Spontaneity in thermodynamics refers to whether a process can occur on its own without continuous external input of energy; a reaction is spontaneous if it results in a decrease in Gibbs free energy (delta-G < 0).

Question 8

Give two examples of Single celled organisms.

Accepted Answer

Single-celled (unicellular) organisms perform all life functions within a single cell; examples include Amoeba proteus and Paramecium caudatum (protozoa), or Escherichia coli (bacterium) and Saccharomyces cerevisiae (yeast).

Question 9

Write the function of protein.

Accepted Answer

Proteins perform diverse essential functions in living organisms, including catalysis, structural support, transport, signaling, defense, and regulation of gene expression.

Question 10

What is objective of the course?

Accepted Answer

The objective of the Biology for Engineers course is to equip engineering students with fundamental biological knowledge needed to understand, interface with, and design systems that interact with living organisms.

Question 11

Write the fundamental differences between Science and Engineering by drawing …

Accepted Answer

Science analyzes nature to discover truths, while engineering synthesizes components to build useful systems; the biological eye (evolved) and the camera (engineered) embody this distinction.

Question 12

Define Epistasis. Explain recessive epistasis with the help of suitable examp…

Accepted Answer

Epistasis is the masking of one gene's effect by another non-allelic gene; in recessive epistasis, the homozygous recessive genotype at one locus suppresses the expression of alleles at a second locus, giving a 9:3:4 ratio.

Question 13

Explain ultrastructure of Prokaryotic and Eukaryotic cell.

Accepted Answer

Prokaryotic cells lack a membrane-bound nucleus and organelles; eukaryotic cells possess a nucleus enclosed by a nuclear envelope and membrane-bound organelles, representing greater structural complexity.

Question 14

Write short notes on the following:

(a) Amino acids
(b) Nucleotide

Accepted Answer

Amino acids are the monomer building blocks of proteins containing an amino group and a carboxyl group; nucleotides are the building blocks of nucleic acids (DNA and RNA) consisting of a sugar, phosphate, and nitrogenous base.

Question 15

Explain molecular basis of information transfer.

Accepted Answer

The molecular basis of information transfer follows the Central Dogma: DNA is replicated to pass genetic information, transcribed to RNA, and translated to protein, with information flowing from nucleic acid sequence to amino acid sequence.

Question 16

Write short notes on the following:

(a) Growth Kinetics
(b) Sterilization

Accepted Answer

Growth kinetics describes the mathematical relationship between microbial growth rate and conditions; sterilization is the complete elimination of all microorganisms using physical or chemical methods.

Question 17

Write short notes on the following:

(a) Protein as Enzymes
(b) Protein as Re…

Accepted Answer

Proteins function both as enzymes (biological catalysts) and as receptors (molecular switches that detect and transmit extracellular signals into cellular responses).

Question 18

Describe Mendel's Law of Independent Assortment and concept of Segregation in…

Accepted Answer

Mendel's Law of Segregation states that allele pairs separate during gamete formation; the Law of Independent Assortment states that alleles of different gene pairs assort independently, producing a 9:3:3:1 ratio in dihybrid crosses.

Question 19

Write an essay on Terrestrial habitat.

Accepted Answer

Terrestrial habitats are land-based environments characterized by distinct physical and climatic conditions that support diverse communities of organisms, ranging from tropical forests to deserts and tundra.

Question 20

Describe genetic code in detail.

Accepted Answer

The genetic code is a set of 64 triplet codons in mRNA that specify the 20 amino acids and three stop signals, characterized by being triplet, non-overlapping, degenerate, comma-free, and nearly universal.

Question 21

Write an essay on Mechanism of Enzyme Action.

Accepted Answer

Enzyme action involves specific substrate binding at the active site, formation of an enzyme-substrate complex, lowering of activation energy via various catalytic mechanisms, and release of products with regeneration of the free enzyme.

Question 22

Describe Primary, Secondary, Tertiary and Quaternary Structure of Protein.

Accepted Answer

Protein structure is organized at four hierarchical levels: primary (amino acid sequence), secondary (local folding into alpha-helices and beta-sheets), tertiary (overall 3D conformation), and quaternary (assembly of multiple polypeptide chains).