Which bond forms between amino acids in a protein?
Anonymous Quiz
10%
Ionic bond
76%
Covalent (peptide) bond
10%
Hydrogen bond
4%
Van der Waals bond
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Which organ produces red blood cells in adults?
Anonymous Quiz
13%
Liver
12%
Thymus
67%
Red bone marrow
8%
Spleen
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What are planetary rings composed of?
Anonymous Quiz
14%
An asteroid belt around Saturn
73%
Discs of ice and dust orbiting a planet
10%
A nebula around a star
3%
A system of close moons
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What is DNA transcription?
Anonymous Quiz
18%
DNA duplication before mitosis
64%
Synthesis of RNA from the DNA template
12%
Protein synthesis from mRNA
6%
Repair of damaged DNA strands
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Which law describes the gravitational force between two masses?
Anonymous Quiz
12%
Coulomb's law
9%
Hooke's law
76%
Newton's law of universal gravitation
3%
Gauss's law
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Which ear structure converts sound vibrations into nerve signals?
Anonymous Quiz
24%
Eardrum
53%
Hammer, anvil and stirrup
19%
Cochlea
5%
Semicircular canals
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What does Mendel's law of segregation state?
Anonymous Quiz
7%
Traits blend across generations
80%
During gamete formation, the two alleles of each gene separate into distinct gametes
9%
Genes are inherited together if close on a chromosome
4%
Mutations are transmitted only maternally
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Which phenomenon explains the expansion of the universe?
Anonymous Quiz
10%
Centrifugal force of galactic rotation
70%
Cosmological redshift and Hubble's law
16%
Gravitational field of black holes
4%
Nuclear reactions in stars
What is a neutralisation reaction?
Anonymous Quiz
1%
An acid dissolving a metal
93%
The reaction between an acid and a base producing salt and water
5%
Decomposition of a salt into ions
1%
A heat-absorbing reaction
Which type of radiation is stopped by a sheet of paper?
Anonymous Quiz
19%
Gamma rays
27%
Beta rays
36%
Alpha rays
18%
X-rays
What does ethology study?
Anonymous Quiz
52%
Chemical composition of organisms
28%
Animal behaviour
13%
Mineral structure
7%
Genetic diseases
Which macromolecule is the primary long-term energy store in animals?
Anonymous Quiz
25%
Glycogen
20%
Starch
49%
Lipids (triglycerides)
6%
Proteins
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