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Worksheets2nd session
Total questions: 71
Worksheet time: 36mins
Which of the following is a primary characteristic of a eukaryotic cell that distinguishes it from a prokaryotic cell?
Presence of a cell wall
Absence of ribosomes
Presence of a membrane-bound nucleus
Ability to perform photosynthesis
The rough endoplasmic reticulum (RER) is characterized by the presence of ribosomes on its surface and plays a crucial role in:
Lipid synthesis and detoxification
Packaging and sorting proteins for secretion or delivery to other organelles
Protein synthesis for secretion or insertion into membranes
ATP production through cellular respiration
Which of the following best describes the "fluid mosaic model" of the cell membrane?
A rigid, fixed structure of lipids with proteins embedded.
A double layer of proteins with interspersed carbohydrate chains.
A static framework of cholesterol molecules determining membrane shape.
A dynamic arrangement of phospholipids with embedded and associated proteins.
The first individual credited with describing "cells" after observing cork through a microscope was:
Jansen
Hooke
Brown
Schleiden & Schwann
Who were the scientists primarily responsible for proposing the cell theory, stating that all organisms are comprised of cells?
Hooke and Brown
Schleiden and Schwann
Virchow and Altmann
Gorter and Grendel
The phrase "omnis cellula e cellula," meaning "cells develop only from pre-existing cells by a process called cell division," was proposed by:
Rudolf Virchow
Flemming
Golgi
Porter
Which of the following organelles was first described by Altmann in 1894?
Nucleus
Golgi apparatus
Mitochondria
Endoplasmic Reticulum
The basic structure of the plasma membrane was described in 1925 by:
Hooke
Flemming
Gorter & Grendel
Porter
Where do all cells come from, according to Modern Cell Theory?
They appear from nowhere.
They come from non- living things.
They form from air and water.
They come from other cells.
Both prokaryotic and eukaryotic cells have a flexible outer layer that controls what enters and leaves the cell. What is this layer called?
Plasma membrane
Cell wall
Capsule
Nucleus
What type of genetic material do both prokaryotic and eukaryotic cells contain?
RNA
Protein
DNA
Lipids
Which type of cell, prokaryote or eukaryote, has no distinct subcellular organelles?
Prokaryotes/Bacteria
Eukaryotes
Both prokaryotes and eukaryotes
Neither prokaryotes nor eukaryotes
Which type of cell is generally larger, ranging from 10 to 100 micrometers (µm) in size?
Prokaryotes/Bacteria
Eukaryotes
Viruses
Both are the same size
In a bacterial cell, the main genetic material (circular double- stranded DNA) is found in a region called the:
Nucleus
Plasmid
Mesosome
Nucleoid
Which cell structure is responsible for carrying out protein synthesis in both prokaryotic and eukaryotic cells?
Nucleus
Mitochondria
Ribosomes
Lysosomes
Which eukaryotic organelle is a system of membranes, involved in making lipids and detoxifying harmful substances?
Rough Endoplasmic Reticulum
Smooth Endoplasmic Reticulum
Lysosome
Nucleus
Small, membrane- bound organelles containing degradative enzymes for breaking down waste materials and macromolecules are called:
Peroxisomes
Lysosomes
Centrioles
Vacuoles
The rigid outer layer of bacteria, made up of murein, that provides protection from external factors like lysozymes and penicillin, is the:
Plasma membrane
Capsule
Cell Wall
Cytoplasm
What is the main purpose of the Polymerase Chain Reaction (PCR)?
To amplify (make many copies of) DNA
To make DNA smaller
To cut DNA into pieces
To repair damaged DNA
What is programmed cell death called?
Necrosis
Mitosis
Apoptosis
Inflammation
What is the scientific study of cells called?
Histology
Physiology
Anatomy
Cytology
Who coined the term "molecular biology"?
Rockefeller
Warren Weaver
Schleiden
Hooke
Which blotting technique is used for the detection of DNA?
Northern blotting
Western blotting
Southern blotting
Eastern blotting
How did the magnification of Antonie van Leeuwenhoek's microscope compare to Robert Hooke's?
It had 10 times less magnification.
It had the same magnification.
It had 10 times more magnification.
It had 15 times more magnification.
Which French scientist discovered "protoplasm," which is also known as cytoplasm?
Robert Brown
Felix Dujardin
Louis Pasteur
Antoine Lavoisier
The enzyme responsible for unwinding the DNA double helix during DNA replication is:
DNA ligase
DNA polymerase
Helicase
Primase
Which of the following scientists are credited with isolating the first hormone, Epinephrine, according to the provided timeline?
Takamine, Aldrich and Abel
Jansen & Donath
Schlesinger
Jacob & Monad
The term "ENZYME" was coined by which scientist and in what year
Miescher in 1869
Kuhne in 1877
Takamine in 1903
Johannsen in 1909
The "highly complex" nature of cells is due to a mix of which elements?
Only carbon and oxygen
Primarily hydrogen and nitrogen
Carbon, Oxygen, Hydrogen, and Nitrogen
Any combination of elements
What are the processes by which cells can replicate themselves?
Glycolysis and Krebs
Mitosis and Meiosis
Assembly and Disassembly
Paracrine and Endocrine
Budding, a method of asexual reproduction, occurs in which of the following organisms?
Most yeast, hydra, and some filamentous fungi
Bacteria, protozoa, and algae
Animals, plants, and viruses
Humans, birds, and fish
Which type of reproduction involves somatic cells dividing via mitosis?
Sexual
Asexual
Binary Fission
Meiosis
Who first discovered nucleic acids and from what source?
Friedrich Meishher, from the cytoplasm of red blood cells
Friedrich Meishher, from the nuclei of pus cells (leukocytes)
James Watson, from bacterial cells
Francis Crick, from plant cells
In the Central Dogma, what process converts the sequence of bases in DNA into a complementary single-stranded mRNA molecule?
Replication
Translation
Transcription
Protein synthesis
Which scientist conducted experiments on pea plants to prove the genetic material?
Gregor Mendel
Friedrich Miescher
Erwin Chargaff
M. Wilkins
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?
Ribosomal RNA (rRNA)
Transfer RNA (tRNA)
Messenger RNA (mRNA)
Small nuclear RNA (snRNA)
Which type of stem cell is specifically mentioned as being able to produce blood cells in bone marrow?
Neural stem cells
Adult stem cells
Embryonic stem cells
Hematopoietic stem cells
What term describes a virus particle when it is outside a host cell?
Pathogen
Parasite
Virion
Capsid
Who invented the first useful compound microscope in 1590?
Galileo Galilei
Francis Janssen and Zacharias Janssen
Robert Hooke
Anton van Leeuwenhoek
What is the basic shape of Eukaryotic Cells?
Polyhedral
Flattened
Spherical
Cuboidal
In which famous work did Hooke publish his findings?
Opticks
Principia Mathematica
Micrographia
Siderius Nuncius
What is the term for organisms made of only one cell?
Multicellular
Unicellular
Protozoa
Animals
Which of the following is considered one of the most primitive organisms, characterized by its simple structure and early evolutionary appearance?
Fungi
Plants
Bacteria
Animals
Which of the following bacterial shapes is correctly matched with its description and example?
Cocci - (rod-shaped) e.g., Mycobacterium
Bacilli - (spherical shaped) e.g., Streptococcus pyogenes
Spirilla - (spiral or twisted) e.g., Treponema pallidum
Cocci - (spiral or twisted) e.g., Diplococcus pneumonia
Which type of cytoskeleton filament is described as the "thickest"?
Microfilaments
Intermediate filaments
Microtubules
Actin filaments
In the green leaves of plants, peroxisomes perform a specific process crucial for plant metabolism. What is this process called?
Cellular respiration
Transpiration
Photorespiration
Glycolysis
Which type of plastid is characterized by being colorless and primarily functions in storing food in the form of starch, protein, and lipids?
Chloroplasts
Chromoplasts
Leucoplasts
Amyloplasts
What is normally the largest organelle within a Eukaryotic cell?
Mitochondrion
Nucleus
Ribosome
Endoplasmic Reticulum
Animal and plant cell differ in their
Movement
Growth
Nutrition
Respiration
Which of the following dyes is best suited for staining chromosomes?
Basic Fuchsin
Safranin
Methylene blue
Carmine
The chloroplast thylakoids are in the form of
Interconnected sacs
Interconnected tubule
Independent discs
Stacked discs
Which of the following organelle is called as the "Traffic Police" of the cell?
Lysosome
SER
Golgi apparatus
RER
Which of the following pigment is most abundant in green plants
Chlorophyll a
Chlorophyll b
Carotene
Xanthophyll
In which stage of meiosis does the genetic constitution of gametes is finally decided
Metaphase I
Anaphase I
Metaphase II
Anaphase II
Centrosomes are duplicated during which phase of the cell cycle?
Anaphase
Interphase
Metaphase
Telophase
DNA replication is
Conservative and discontinuous
Semi-conservative and discontinuous
Semi-conservative and semi-discontinuous
Conservative
Hershey and Chase, by their experiment onto bacteriophage and E. coli proved
DNA is genetic material
RNA is genetic material of viruses
Bacteriophage attacks bacteria like E.coli
Protein is the genetic material
Nucleotide arrangement in DNA can be seen by
X-ray crystallography
Electron microscopy
Centrifuge
Light microscope
Which of these scientists designed an experiment to show that DNA replication was semi-conservative?
James Watson
Meselson
Linus Pauling
Robert Hooke
Most abundant RNA of the cell is?
t-RNA
m-RNA
r-RNA
Si-RNA
The smallest RNA is:
m-RNA
r-RNA
t-RNA
Chromosomal RNA
t-RNA is also called
Soluble RNA
Messenger RNA
Microsomal RNA
Informosome
The process by which mRNA is made by DNA and protein by mRNA are respectively called?
Translation and Transcription
Transcription and Translation
Synthesis of mRNA and protein
Replication of mRNA and protein
Work done by Mendel belongs to:
Neoclassical genetics
Modern genetics
Ultra modern genetics
Classical genetics
What will be the correct gene expression pathway?
Gene – mRNA –transcription - translation - protein
Transcription – gene – translation – mRNA - protein
Gene – transcription – mRNA – translation - protein
Gene – translation – mRNA – transcription – protein
The genetic code consists of groups of three nucleotides called?
Codons
Introns
Anticodons
Reading frames
Which PCR technique is used to quantify the starting amounts of nucleic acid template by analyzing the amount of DNA produced during each cycle?
Real-time PCR
Gel Electrophoresis
Standard PCR
DNA Sequencing
What is the process of producing complex molecules within living organisms or cells?
Biosynthesis
Catabolism
Degeneration
Decomposition
What is the region of a DNA molecule that serves as the site where transcription of a gene begins?
Enhancer
Terminator
Promoter
Operator
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?
Telomeres
Plasmids
Okazaki fragments
Primers
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?
Renaturation
Denaturation
Polymerization
Hydrolosis
