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Worksheets

2nd session

Total questions: 71

Worksheet time: 36mins

Name
Class
Date
1.

Which of the following is a primary characteristic of a eukaryotic cell that distinguishes it from a prokaryotic cell?

a)

Presence of a cell wall

b)

Absence of ribosomes

c)

Presence of a membrane-bound nucleus

d)

Ability to perform photosynthesis

2.

The rough endoplasmic reticulum (RER) is characterized by the presence of ribosomes on its surface and plays a crucial role in:

a)

Lipid synthesis and detoxification

b)

Packaging and sorting proteins for secretion or delivery to other organelles

c)

Protein synthesis for secretion or insertion into membranes

d)

ATP production through cellular respiration

3.

Which of the following best describes the "fluid mosaic model" of the cell membrane?

a)

A rigid, fixed structure of lipids with proteins embedded.

b)

A double layer of proteins with interspersed carbohydrate chains.

c)

A static framework of cholesterol molecules determining membrane shape.

d)

A dynamic arrangement of phospholipids with embedded and associated proteins.

4.

The first individual credited with describing "cells" after observing cork through a microscope was:

a)

Jansen

b)

Hooke

c)

Brown

d)

Schleiden & Schwann

5.

Who were the scientists primarily responsible for proposing the cell theory, stating that all organisms are comprised of cells?

a)

Hooke and Brown

b)

Schleiden and Schwann

c)

Virchow and Altmann

d)

Gorter and Grendel

6.

The phrase "omnis cellula e cellula," meaning "cells develop only from pre-existing cells by a process called cell division," was proposed by:

a)

Rudolf Virchow

b)

Flemming

c)

Golgi

d)

Porter

7.

Which of the following organelles was first described by Altmann in 1894?

a)

Nucleus

b)

Golgi apparatus

c)

Mitochondria

d)

Endoplasmic Reticulum

8.

The basic structure of the plasma membrane was described in 1925 by:

a)

Hooke

b)

Flemming

c)

Gorter & Grendel

d)

Porter

9.

Where do all cells come from, according to Modern Cell Theory?

a)

They appear from nowhere.

b)

They come from non- living things.

c)

They form from air and water.

d)

They come from other cells.

10.

Both prokaryotic and eukaryotic cells have a flexible outer layer that controls what enters and leaves the cell. What is this layer called?

a)

Plasma membrane

b)

Cell wall

c)

Capsule

d)

Nucleus

11.

What type of genetic material do both prokaryotic and eukaryotic cells contain?

a)

RNA

b)

Protein

c)

DNA

d)

Lipids

12.

Which type of cell, prokaryote or eukaryote, has no distinct subcellular organelles?

a)

Prokaryotes/Bacteria

b)

Eukaryotes

c)

Both prokaryotes and eukaryotes

d)

Neither prokaryotes nor eukaryotes

13.

Which type of cell is generally larger, ranging from 10 to 100 micrometers (µm) in size?

a)

Prokaryotes/Bacteria

b)

Eukaryotes

c)

Viruses

d)

Both are the same size

14.

In a bacterial cell, the main genetic material (circular double- stranded DNA) is found in a region called the:

a)

Nucleus

b)

Plasmid

c)

Mesosome

d)

Nucleoid

15.

Which cell structure is responsible for carrying out protein synthesis in both prokaryotic and eukaryotic cells?

a)

Nucleus

b)

Mitochondria

c)

Ribosomes

d)

Lysosomes

16.

Which eukaryotic organelle is a system of membranes, involved in making lipids and detoxifying harmful substances?

a)

Rough Endoplasmic Reticulum

b)

Smooth Endoplasmic Reticulum

c)

Lysosome

d)

Nucleus

17.

Small, membrane- bound organelles containing degradative enzymes for breaking down waste materials and macromolecules are called:

a)

Peroxisomes

b)

Lysosomes

c)

Centrioles

d)

Vacuoles

18.

The rigid outer layer of bacteria, made up of murein, that provides protection from external factors like lysozymes and penicillin, is the:

a)

Plasma membrane

b)

Capsule

c)

Cell Wall

d)

Cytoplasm

19.

What is the main purpose of the Polymerase Chain Reaction (PCR)?

a)

To amplify (make many copies of) DNA

b)

To make DNA smaller

c)

To cut DNA into pieces

d)

To repair damaged DNA

20.

What is programmed cell death called?

a)

Necrosis

b)

Mitosis

c)

Apoptosis

d)

Inflammation

21.

What is the scientific study of cells called?

a)

Histology

b)

Physiology

c)

Anatomy

d)

Cytology

22.

Who coined the term "molecular biology"?

a)

Rockefeller

b)

Warren Weaver

c)

Schleiden

d)

Hooke

23.

Which blotting technique is used for the detection of DNA?

a)

Northern blotting

b)

Western blotting

c)

Southern blotting

d)

Eastern blotting

24.

How did the magnification of Antonie van Leeuwenhoek's microscope compare to Robert Hooke's?

a)

It had 10 times less magnification.

b)

It had the same magnification.

c)

It had 10 times more magnification.

d)

It had 15 times more magnification.

25.

Which French scientist discovered "protoplasm," which is also known as cytoplasm?

a)

Robert Brown

b)

Felix Dujardin

c)

Louis Pasteur

d)

Antoine Lavoisier

26.

The enzyme responsible for unwinding the DNA double helix during DNA replication is:

a)

DNA ligase

b)

DNA polymerase

c)

Helicase

d)

Primase

27.

Which of the following scientists are credited with isolating the first hormone, Epinephrine, according to the provided timeline?

a)

Takamine, Aldrich and Abel

b)

Jansen & Donath

c)

Schlesinger

d)

Jacob & Monad

28.

The term "ENZYME" was coined by which scientist and in what year

a)

Miescher in 1869

b)

Kuhne in 1877

c)

Takamine in 1903

d)

Johannsen in 1909

29.

The "highly complex" nature of cells is due to a mix of which elements?

a)

Only carbon and oxygen

b)

Primarily hydrogen and nitrogen

c)

Carbon, Oxygen, Hydrogen, and Nitrogen

d)

Any combination of elements

30.

What are the processes by which cells can replicate themselves?

a)

Glycolysis and Krebs

b)

Mitosis and Meiosis

c)

Assembly and Disassembly

d)

Paracrine and Endocrine

31.

Budding, a method of asexual reproduction, occurs in which of the following organisms?

a)

Most yeast, hydra, and some filamentous fungi

b)

Bacteria, protozoa, and algae

c)

Animals, plants, and viruses

d)

Humans, birds, and fish

32.

Which type of reproduction involves somatic cells dividing via mitosis?

a)

Sexual

b)

Asexual

c)

Binary Fission

d)

Meiosis

33.

Who first discovered nucleic acids and from what source?

a)

Friedrich Meishher, from the cytoplasm of red blood cells

b)

Friedrich Meishher, from the nuclei of pus cells (leukocytes)

c)

James Watson, from bacterial cells

d)

Francis Crick, from plant cells

34.

In the Central Dogma, what process converts the sequence of bases in DNA into a complementary single-stranded mRNA molecule?

a)

Replication

b)

Translation

c)

Transcription

d)

Protein synthesis

35.

Which scientist conducted experiments on pea plants to prove the genetic material?

a)

Gregor Mendel

b)

Friedrich Miescher

c)

Erwin Chargaff

d)

M. Wilkins

36.

Which type of RNA carries the genetic code from DNA in the nucleus to the ribosomes in the cytoplasm, serving as a template for protein synthesis?

a)

Ribosomal RNA (rRNA)

b)

Transfer RNA (tRNA)

c)

Messenger RNA (mRNA)

d)

Small nuclear RNA (snRNA)

37.

Which type of stem cell is specifically mentioned as being able to produce blood cells in bone marrow?

a)

Neural stem cells

b)

Adult stem cells

c)

Embryonic stem cells

d)

Hematopoietic stem cells

38.

What term describes a virus particle when it is outside a host cell?

a)

Pathogen

b)

Parasite

c)

Virion

d)

Capsid

39.

Who invented the first useful compound microscope in 1590?

a)

Galileo Galilei

b)

Francis Janssen and Zacharias Janssen

c)

Robert Hooke

d)

Anton van Leeuwenhoek

40.

What is the basic shape of Eukaryotic Cells?

a)

Polyhedral

b)

Flattened

c)

Spherical

d)

Cuboidal

41.

In which famous work did Hooke publish his findings?

a)

Opticks

b)

Principia Mathematica

c)

Micrographia

d)

Siderius Nuncius

42.

What is the term for organisms made of only one cell?

a)

Multicellular

b)

Unicellular

c)

Protozoa

d)

Animals

43.

Which of the following is considered one of the most primitive organisms, characterized by its simple structure and early evolutionary appearance?

a)

Fungi

b)

Plants

c)

Bacteria

d)

Animals

44.

Which of the following bacterial shapes is correctly matched with its description and example?

a)

Cocci - (rod-shaped) e.g., Mycobacterium

b)

Bacilli - (spherical shaped) e.g., Streptococcus pyogenes

c)

Spirilla - (spiral or twisted) e.g., Treponema pallidum

d)

Cocci - (spiral or twisted) e.g., Diplococcus pneumonia

45.

Which type of cytoskeleton filament is described as the "thickest"?

a)

Microfilaments

b)

Intermediate filaments

c)

Microtubules

d)

Actin filaments

46.

In the green leaves of plants, peroxisomes perform a specific process crucial for plant metabolism. What is this process called?

a)

Cellular respiration

b)

Transpiration

c)

Photorespiration

d)

Glycolysis

47.

Which type of plastid is characterized by being colorless and primarily functions in storing food in the form of starch, protein, and lipids?

a)

Chloroplasts

b)

Chromoplasts

c)

Leucoplasts

d)

Amyloplasts

48.

What is normally the largest organelle within a Eukaryotic cell?

a)

Mitochondrion

b)

Nucleus

c)

Ribosome

d)

Endoplasmic Reticulum

49.

Animal and plant cell differ in their

a)

Movement

b)

Growth

c)

Nutrition

d)

Respiration

50.

Which of the following dyes is best suited for staining chromosomes?

a)

Basic Fuchsin

b)

Safranin

c)

Methylene blue

d)

Carmine

51.

The chloroplast thylakoids are in the form of

a)

Interconnected sacs

b)

Interconnected tubule

c)

Independent discs

d)

Stacked discs

52.

Which of the following organelle is called as the "Traffic Police" of the cell?

a)

Lysosome

b)

SER

c)

Golgi apparatus

d)

RER

53.

Which of the following pigment is most abundant in green plants

a)

Chlorophyll a

b)

Chlorophyll b

c)

Carotene

d)

Xanthophyll

54.

In which stage of meiosis does the genetic constitution of gametes is finally decided

a)

Metaphase I

b)

Anaphase I

c)

Metaphase II

d)

Anaphase II

55.

Centrosomes are duplicated during which phase of the cell cycle?

 

a)

Anaphase

b)

Interphase

c)

Metaphase

d)

Telophase

56.

DNA replication is

a)

Conservative and discontinuous

b)

Semi-conservative and discontinuous

c)

Semi-conservative and semi-discontinuous

d)

Conservative

57.

Hershey and Chase, by their experiment onto bacteriophage and E. coli proved

a)

DNA is genetic material

b)

RNA is genetic material of viruses

c)

Bacteriophage attacks bacteria like E.coli

d)

Protein is the genetic material

58.

Nucleotide arrangement in DNA can be seen by

a)

X-ray crystallography

b)

Electron microscopy

c)

Centrifuge

d)

Light microscope

59.

Which of these scientists designed an experiment to show that DNA replication was semi-conservative?

a)

James Watson

b)

Meselson

c)

Linus Pauling

d)

Robert Hooke

60.

Most abundant RNA of the cell is?

a)

t-RNA

b)

m-RNA

c)

r-RNA

d)

Si-RNA

61.

The smallest RNA is:

a)

m-RNA

b)

r-RNA

c)

t-RNA

d)

Chromosomal RNA

62.

t-RNA is also called

a)

Soluble RNA

b)

Messenger RNA

c)

Microsomal RNA

d)

Informosome

63.

The process by which mRNA is made by DNA and protein by mRNA are respectively called?

a)

Translation and Transcription

b)

Transcription and Translation

c)

Synthesis of mRNA and protein

d)

Replication of mRNA and protein

64.

Work done by Mendel belongs to:

a)

Neoclassical genetics

b)

Modern genetics

c)

Ultra modern genetics

d)

Classical genetics

65.

What will be the correct gene expression pathway?

a)

Gene – mRNA –transcription - translation - protein

b)

Transcription – gene – translation – mRNA - protein

c)

Gene – transcription – mRNA – translation - protein

d)

Gene – translation – mRNA – transcription – protein

66.

The genetic code consists of groups of three nucleotides called?

a)

Codons

b)

Introns

c)

Anticodons

d)

Reading frames

67.

Which PCR technique is used to quantify the starting amounts of nucleic acid template by analyzing the amount of DNA produced during each cycle?

a)

Real-time PCR

b)

Gel Electrophoresis

c)

Standard PCR

d)

DNA Sequencing

68.

What is the process of producing complex molecules within living organisms or cells?

a)

Biosynthesis

b)

Catabolism

c)

Degeneration

d)

Decomposition

69.

What is the region of a DNA molecule that serves as the site where transcription of a gene begins?

a)

Enhancer

b)

Terminator

c)

Promoter

d)

Operator

70.

What are the short, discontinuously synthesized sequences of DNA nucleotides that are later linked together by DNA ligase to form the lagging strand during DNA replication?

a)

Telomeres

b)

Plasmids

c)

Okazaki fragments

d)

Primers

71.

What is the process where proteins or nucleic acids lose their quaternary, tertiary, and secondary structures from their native state due to external stress or compounds like strong acids, bases, or organic solvents?

a)

Renaturation

b)

Denaturation

c)

Polymerization

d)

Hydrolosis