Curriculum
Login

Curriculum

Biology & Geology

Chapter 1 - Support and Movement in Living Organisms

0/26

Chapter 2 - Hormonal Coordination in Living Organisms

0/32

Chapter 3 - Reproduction in Living Organisms

0/33

Chapter 4 - Immunity in Living Organisms

0/34

Chapter 5 - Molecular Biology - DNA Structure and Function

0/43

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

0/38

Chapter 7 - Geology, Earth Sciences and Ecology

0/28
Quiz

Lesson 1 Quiz: Plant Immunity (Structural and Biochemical Defense)

Submit quiz
Once you submit, you will no longer be able to change your answers. Are you sure you want to submit the quiz?
Cancel Submit
  • Questions count: 20
Start Quiz
1.
What is the structural characteristic of a restriction endonuclease recognition site?
It contains only adenine and thymine bases.
It always begins with the start codon AUG.
It consists of 15-20 repetitive nucleotides.
It is a palindromic sequence reading identical 5' to 3' on both strands.
2.
Interstitial cells in the human male testicle respond directly and secrete testosterone under the influence of a pituitary hormone:
FSH hormone
Growth hormone
Prolactin hormone
Luteinizing hormone (LH)
3.
Natural killer (NK) cells attack and kill cancer cells and virus-infected cells by:
Secretion of antibodies
Swallow the cells whole
Histamine secretion
Secretion of specialized digestive enzymes without the need for prior specific antigen recognition
4.
Which of the following oxides is amphoteric?
ZnO
SO3
MgO
Na2O
5.
Experiments using genes for resistance to insect pests in crop plants (such as the Bacillus thuringiensis gene) are an application to:
Artificial parthenogenesis
Parthenogenetic fruiting
Propagation by hydroponics
Genetic engineering and development of genetically modified plants resistant to pests without chemical pesticides
6.
If the tangent to y = x2 - 4x + 5 is parallel to the x-axis, the point of tangency is:
(0, 5)
(2, 0)
(2, 1)
(4, 5)
7.
The indicator that exhibits a yellow color in acidic medium, blue in alkaline medium, and green in neutral medium is:
Phenolphthalein
Litmus solution
Bromothymol blue
Methyl orange
8.
The cells that secrete the hormones oxytocin and ADH and store them in the posterior lobe of the pituitary gland are:
Glial cells
Pineal gland cells
Apocrine neurons in the hypothalamus (hypothalamus)
Frontal lobe glandular cells
9.
When dry chlorine gas is passed over red-hot iron filings, iron(III) chloride (FeCl3) is exclusively formed rather than iron(II) chloride because:
Chlorine cannot react with the inner 3d electrons
The reaction occurs strictly in an alkaline medium
Chlorine gas is a powerful oxidizing agent that readily oxidizes any formed Fe2+ to Fe3+
Iron(II) chloride spontaneously sublimes into thin air
10.
Which of the following alloys is classified as an interstitial alloy?
Duralumin (Aluminum and Copper)
Brass (Copper and Zinc)
Stainless steel (Iron, Chromium, and Nickel)
Carbon steel (Iron and Carbon where small carbon atoms occupy interstitial voids)
11.
The hydrostatic pressure exerted by a static homogeneous liquid of density rho at depth h beneath its free surface is expressed by:
P = rho * g * h
P = 1/2 rho * g * h2
P = rho * h / g
P = rho * g / h
12.
Okazaki Fragments formed on the die strip (5' to 3') During DNA replication they are joined by an enzyme:
DNA ligase
Polymerase enzyme
Helix enzyme
Tac polymerase enzyme
13.
What is the result of the deposition of cutin on the epidermis of desert plant leaves?
Increase the thickness of the synthetic support and reduce the transpiration rate to maintain the physiological support
The process of photosynthesis stops completely
Vacuole explosion
Physiological support was lost quickly
14.
Vaccination gives humans immunity:
Acquired long-term positivity for the formation of memory cells
Not specialized
Innate, inherited
Temporary negativity that disappears within weeks
15.
In a U-tube manometer containing two immiscible liquids in equilibrium, the heights of the liquid columns measured above the separating surface are:
Inversely proportional to their respective densities (h1 / h2 = rho2 / rho1)
Equal regardless of the liquids used
Directly proportional to their densities
Proportional to the square of the cross-sectional area of the tube
16.
Tyloses in plants are formed specifically as a result of:
Proliferation of parenchyma cells into xylem vessels through pits following injury
Secretion of toxic phenolic compounds into phloem sieve tubes
Excessive transpiration on hot summer days
Deposition of suberin on epidermal cells
17.
Connecting two complementary DNA strands by hydrogen bonds makes them:
connected by peptide bonds
criss-crossing each lap
Two parallel strands in opposite directions that are chemically complementary
Two exactly identical bars in the same direction
18.
A U-tube contains water (ρ = 1000 kg/m3) and oil (ρ = 800 kg/m3). If the oil column height above the interface is 10 cm, the balancing water column height is:
8 cm
10 cm
12.5 cm
6.4 cm
19.
What is the direct physiological effect of injecting a healthy person with an excessive dose of the hormone insulin?
A sharp increase in blood sugar
Increased urine secretion
Uric acid accumulation
A severe drop in blood glucose levels (hypoglycemia) and hypoglycemic coma
20.
The reaction between an acid and a base to produce a salt and water is known as a:
Combustion reaction
Polymerization reaction
Neutralization reaction
Thermal decomposition reaction
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20