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Biology & Geology

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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Quiz

Lesson 2 Quiz: Rock Cycle, Minerals, Crystallography and Weathering

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1.
The number of terms in the finite arithmetic sequence (5, 9, 13, ..., 81) is:
25 terms
20 terms
19 terms
21 terms
2.
According to the Chain Rule, if y = (3 x2 - 5)4, then dy/dx is:
24 x (3 x2 - 5)3
6 x (3 x2 - 5)3
12 x (3 x2 - 5)4
4 (3 x2 - 5)3
3.
The nitrogen molecule (N2) contains a:
Single ionic bond
Triple covalent bond (one sigma bond and two pi bonds) sharing 3 electron pairs
Coordinate dative bond
Double covalent bond
4.
Antidiuretic hormone (ADH/vasopressin) works to raise blood pressure by:
Stimulate sweat
Smooth blood vessel constriction and water reabsorption in nephrons
Expansion of the arteries
Sodium excretion in urine
5.
Injection with serum (Antiserum) containing ready-made antibodies to neutralize scorpion venom gives the patient immunity:
A rapid and temporary acquired negativity that is not accompanied by memory cells
Lasting positivity
Cellular induced
Innate
6.
Lymphotoxins secreted by cytotoxic T cells (Tc) eliminate the infected cell by:
Calcium withdrawal
Activation of certain genes within the nucleus of the infected cell, which leads to the fragmentation of its genetic material and its programmed death (Apoptosis).
Blood plasma coagulation
Immunosuppression
7.
Reproduction by peaceful association in two adjacent threads of the spirogyra moss (Rem al-Barak) occurs in the case of:
The environment is exposed to drought, change in water purity, or change in temperature (unsuitable conditions)
Abundance of pure fresh water
Mild spring
Complete darkness
8.
The maximum number of pollen grains that can be produced from the anther of a flower containing 4 sacs, each sac with 20 germinal cells (2N) is:
160 grain
80 grain
640 grain
320 Pollen pill
9.
According to Chargaff's rules's Rules) In the DNA double helix, the equal ratio is always:
A = G And T = C
A / T = 2
The ratio of adenine A equals thymine T, and the ratio of guanine G equals cytosine C (A+G). = T+C)
A + T = G + C always
10.
The number of hydrogen bonds between the nitrogenous base pair guanine and cytosine (G - C) is:
Two hydrogen bonds
One bond
4 Links
3 Hydrogen bonds
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