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: Structure of Earth, Geological Time and Structural Geology

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.
The enzyme that catalyzes the peptidyl transferase reaction and the formation of the peptide bond between amino acids during translation is:
Release factor protein
Helix enzyme
DNA polymerase enzyme
Part of the rRNA molecule that makes up the subunit of the ribosomal subunit
2.
Which of the following hormones is secreted by the pituitary gland and indirectly affects basic metabolic processes and the speed of oxygen consumption?
ADH hormone
The hormone oxytocin
Thyroid stimulating hormone (TSH).
Insulin hormone
3.
The substance that the plant secretes to close wounds in its woody stems and completely isolate the affected tissue from the air and microbes is:
Liquid auxins
Gum and cork
Monosaccharides
Ascorbic acid
4.
Double fertilization in flowering plants involves two fusions:
Fusion of petals with sepals
The fusion of two pollen grains with one egg
The fusion of the zygote nucleus (N) with the egg nucleus (N) to form the zygote (2N), and the fusion of the second nuclei (N) with the two polar nuclei (2N) to form the sperm nucleus.Dosperm (3N)
Chromosome duplication in Takht cells
5.
Substances secreted by T helper cells (Th) and acting as a communication tool to activate neighboring B and T cells are:
Interleukins
Antibodies
Hemoglobin
Myoglobin
6.
In the life cycle of the fougere plant (a fern), the haploid (N) gametophyte produces its male and female gametes by:
Direct meiosis
Regeneration
Surface budding
Mitosis within antheridia and archegonia
7.
The contraceptive method that prevents the fertilized egg from settling in the uterine lining without hindering the ovulation or fertilization processes is:
IUD
Surgical ligation of the fallopian tubes
Condom
Contraceptive pills
8.
The sum to infinity (S_infinity) of a geometric series exists and converges if and only if the common ratio satisfies:
r > 1
|r| < 1 (i.e. -1 < r < 1), and S_infinity = a / (1 - r)
|r| >= 2
r = 1
9.
A chemical substance used in the laboratory to cause mutations and chromosome duplication in the growing tips of plants is:
Sucrose solution
Hyaluronic acid
Colchicine, mustard gas, or nitrous acid
Glycerin
10.
The relative density (specific gravity) of a substance is defined as:
The ratio of the density of the substance to the density of pure water at 4°C
The product of density and the acceleration due to gravity
The mass of the substance divided by its volume at 100°C
The reciprocal of the buoyant force
11.
A metallic bond is physically described as the electrostatic attraction between:
Positive metal cations in the crystal lattice and the mobile sea of delocalized valence electrons
Positive ions and negative non-metal anions
Protons and neutrons in the nucleus
Dipole molecules in a polar liquid
12.
The gland that secretes both external ductal secretion and non-ductal hormonal secretion directly into the blood is:
pituitary gland
Adrenal gland
Thyroid gland
Pancreas (common/mixed gland)
13.
According to Chargaff's rules's Rules) In the DNA double helix, the equal ratio is always:
The ratio of adenine A equals thymine T, and the ratio of guanine G equals cytosine C (A+G). = T+C)
A = G And T = C
A + T = G + C always
A / T = 2
14.
In a hydraulic press, if the radius of the large piston is 4 times that of the small piston, the mechanical advantage is:
8
2
16
4
15.
The 7th term of the geometric sequence (2, 6, 18, ...) is:
729
162
1458
486
16.
Which of the following conditions leads to increased secretion of parathormone from the parathyroid glands?
Low level of ionized calcium in blood plasma
High blood calcium level
Excessive vitamin D excess
Low phosphate
17.
Plant hormones are responsible for the phenomenon of leaf fall and fruit ripening and falling. Where the role of a hormonal gas increases:
Gibberellic acid
Auxin IAA
Abscisic acid
Ethylene gas
18.
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:
80 grain
640 grain
320 Pollen pill
160 grain
19.
The hormone that affects both glandular and non-glandular tissue in the adult female body is:
Aldosterone hormone
Growth hormone
Oxytocin
Calcitonin hormone
20.
Immune chemicals secreted by virus-infected cells to warn neighboring healthy cells to produce enzymes that inhibit virus replication.S is:
Interferons
Chemokines
Interleukins
Complements
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20