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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 2 Quiz: Movement in Plants and Muscle Contraction Mechanics in Humans

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  • Questions count: 20
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1.
Bacterial restriction endonucleases recognize specific nucleotide sequences called recognition sites, and are characterized by:
Palindromes of 4 to 8 pairs read in the same order on both strands in 5′ direction.' to 3'
Stop codons only
Lipoprotein molecules
Asymmetric repetitive sequences
2.
In prokaryotic cells (such as bacteria), a single circular DNA molecule attaches to the plasma membrane at:
Nuclear envelope
Ribosome
Centrosome
One or more sites from which DNA replication begins
3.
The polyadenyne tail (Poly-A Tail) added to the end of the mRNA molecule in eukaryotes consists of about 200 adenine nucleotides and functionally functions to:
Encoding polar amino acids
Formation of the nuclear envelope
Protecting the mRNA molecule from degradation by enzymes in the cytoplasm
Binding to the polymerase enzyme
4.
Mutations that are inherited to future generations and occur in reproductive cells that produce gametes are called:
Gamete mutations
Temporary spikes
Rebound mutations
Somatic mutations
5.
A fixed quantity of an ideal gas has a volume of 600 cm3 at 27 °C. If the gas is heated to 127 °C under constant pressure, its new volume will be:
700 cm3
1200 cm3
800 cm3
900 cm3
6.
A gas cylinder contains 10 liters of gas at a pressure of 3.0 atm. If the volume is reduced to 2.5 liters at constant temperature, the new pressure inside the cylinder will be:
6.0 atm
7.5 atm
12.0 atm
1.2 atm
7.
The location where fertilization of the egg by the sperm occurs in the human female reproductive system is:
Internal uterine cavity
First third of the fallopian tube (near the infundibulum)
Directly to the ovary
the vagina
8.
Antidiuretic hormone (ADH/vasopressin) works to raise blood pressure by:
Smooth blood vessel constriction and water reabsorption in nephrons
Expansion of the arteries
Sodium excretion in urine
Stimulate sweat
9.
The density of an ideal gas at temperature T and pressure P is rho. If the pressure is tripled and the absolute temperature is halved, the new density becomes:
1.5 rho
6 rho (since rho is proportional to P / T)
0.67 rho
3 rho
10.
Sertoli cells in the seminiferous tubules of the human male testicle play a functional role in:
Meiosis to produce precursors
Excretion of fructose
Secretion of testosterone
The secretion of a fluid that nourishes sperm inside the testicle and is thought to have an immunological function
11.
The method of action of antibodies that is considered the most appropriate and most efficient in inactivating viruses and preventing their penetration into cells is:
Alignment method
Decomposition method
Neutralization method
Deposition method
12.
The two main functional sites on the tRNA molecule are:
Phosphate site and sugar site
The amino acid binding site is at the 3′ end' (sequence CCA), and anticodon site
Start location and stop location
DNA polymerase site and binding site
13.
The umbilical cord in the human fetus contains blood vessels that are characterized by:
Two arteries transport deoxygenated blood and waste from the fetus to the placenta, and one vein transports oxygenated blood and nutrients from the placenta to the fetus.
One artery and two veins
All its vessels carry oxygenated blood
Devoid of blood vessels
14.
The chemical compound secreted by mast cells and basal white blood cells that is responsible for the widening of blood vessels and symptoms of inflammation is:
Interleukin
Albumin
Histamine
Heparin
15.
The antibody that is transferred across the placenta from the blood of the pregnant mother to the blood of the fetus to give it natural, passive, acquired immunity is:
IgE
IgD
IgM
IgG
16.
The volume expansion coefficient at constant pressure (alpha_v) of an ideal gas is physically measured using:
A venturi meter and manometer
A hydrometer
A torsion balance
Joly's bulb apparatus or Charles's apparatus with a dry mercury droplet index
17.
A mercury manometer connected to a gas tank shows the mercury level in the free arm is 4 cm higher than the gas arm (Pa = 76 cm Hg). The gas pressure is:
80 cm Hg
4 cm Hg
72 cm Hg
76 cm Hg
18.
The second derivative d2y/dx2 of the function y = x4 - 2 x3 + 5 is:
24 x - 12
4 x3 - 6 x2
12 x2 - 12 x
12 x2 - 6 x
19.
The two sites on the subunit of the ribosomal subunit where the two tRNA molecules stabilize during polypeptide chain elongation are:
Peptidyl site (P) and aminoacyl site (A)
Location 5' And site 3'
The location of the palace and the location of the IUD
Coiling site and binding site
20.
The motile phase (motile zygote / ookinete) in the life cycle of Plasmodium malaria is characterized by:
Haploid group N
It secretes malaria toxin
It is diploid (2N) and penetrates the mosquito's stomach wall and turns into an egg sac
It attacks red blood cells
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