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Biology & Geology

Chapter 1 - Support and Movement in Living Organisms

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Chapter 2 - Hormonal Coordination in Living Organisms

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Chapter 3 - Reproduction in Living Organisms

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Chapter 4 - Immunity in Living Organisms

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Chapter 5 - Molecular Biology - DNA Structure and Function

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Chapter 6 - Molecular Biology - RNA, Protein Synthesis and Genetic Engineering

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Chapter 7 - Geology, Earth Sciences and Ecology

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Quiz

Lesson 1 Quiz: Support in Plants and the Human Skeletal System

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  • Questions count: 20
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1.
The motile phase (motile zygote / ookinete) in the life cycle of Plasmodium malaria is characterized by:
It attacks red blood cells
It secretes malaria toxin
It is diploid (2N) and penetrates the mosquito's stomach wall and turns into an egg sac
Haploid group N
2.
The enzyme used in the crucial experiment to verify the experiments of Avery and his colleagues, which completely analyzes DNA and does not affect protein or RNA, is:
pepsin enzyme
Ribonuclease enzyme
Deoxyribonuclease enzyme
DNA polymerase enzyme
3.
The middle vertebra of the human spine is vertebra No.
Paragraph No. 18
Paragraph No. 20
Paragraph No. 16
Paragraph No. 17 (10th dorsal)
4.
Common and economically beneficial chromosome duplication in the plant kingdom (such as strawberries, wheat, and apples) leads to:
Larger cells and tissues and larger, sweeter and more productive fruits
Plant sterility and death
Loss of chlorophyll
Root loss
5.
When examining a sample of skeletal muscle, it was found that the ratio between the number of nourishing motor nerve fibers to the number of motor units is equal to:
1 : 1
1 : 100
5 : 1
1 : 5
6.
In a titration experiment, 20.0 mL of 0.15 M H2SO4 is completely neutralized by 30.0 mL of NaOH solution. The molar concentration of the NaOH solution is:
0.20 M
0.30 M
0.10 M
0.05 M
7.
Which enzyme is responsible for linking Okazaki fragments into a continuous strand during lagging strand replication?
DNA Ligase
Reverse Transcriptase
DNA Polymerase
DNA Helicase
8.
According to the 2026/2027 Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Physiological vs. Structural Support in Plants?
Physiological support is temporary and completely dependent on water uptake into vacuoles via osmosis, while structural support is permanent via deposition of cellulose, lignin, or suberin
Structural support relies solely on turgor pressure of living parenchyma
Both physiological and structural supports disappear immediately when the plant wilts
Physiological support involves permanent deposition of lignin in stone cells
9.
Phenolphthalein indicator cannot distinguish between an acidic solution and a neutral solution because:
It is red in both
It precipitates in both
It is blue in both
It is colorless in both
10.
The apple is considered a false fruit from a morphological and anatomical perspective because:
Produced from a hermaphrodite flower
It is made without seeds
The edible, fatty part that is lubricated by food is the takht, not the ovary of the flower
The cup leaves become greasy
11.
A bone in the human upper limb skeleton moves in a semicircular motion around another fixed bone:
The radius (moves around the fixed ulna)
Ulna
Fibula
The tibia
12.
Diabetes Mellitus occurs as a result of the inability of the pancreas to secrete the hormone insulin or the weak response of its receptors to it. It is characterized by:
Low glucose and anuria
Enlarged limb bones
Bulging eyes
High blood glucose, its appearance in the urine, frequent urination, and constant thirst
13.
Which of the following oxides is amphoteric?
MgO
SO3
ZnO
Na2O
14.
The movement of hydrotropism in plant roots is considered tropism:
Positive (the root bends in the direction of moisture and water concentration)
Negatively
Unaffected
randomly
15.
Sertoli cells in the seminiferous tubules of the human male testicle play a functional role in:
Excretion of fructose
The secretion of a fluid that nourishes sperm inside the testicle and is thought to have an immunological function
Secretion of testosterone
Meiosis to produce precursors
16.
Thin, mobile protein filaments that connect to the Z lines in the sarcomere are:
Myosin filaments
Keratin threads
Actin filaments
Collagen threads
17.
DNA hybridization depends on the ability of single strands from different sources to combine if:
Made in the same cell
Treatment with shortening enzyme
They are just the same height and weight
They contain complementary sequences of nitrogenous bases and are linked by hydrogen bonds
18.
The functional and mechanical structural unit of skeletal muscle is:
Sarcomere
Myofibril
Motor Unit
Actin filament
19.
The phenomenon of natural parthenogenesis in honey bees results in:
Female workers only
Diploid males
Bees are always male, and their somatic cells are haploid (1N) resulting from an unfertilized egg that grows mitotically.
Fertile queens (2N)
20.
Which of the following organisms has its genetic material as a single molecule of RNA rather than DNA?
Human immunodeficiency virus (HIV), polio virus, influenza and coronavirus
Yeast
Escherichia coli bacteria
Bacteriophage T2
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