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level: Level 1

Questions and Answers List

level questions: Level 1

Question	Answer
The nitrogenous base found in messenger RNA but not in DNA	Uracil
An explanation describing evolution as consisting of long phases of little change alternating with short phases of rapid change	Punctuated equilibrium
Genus to which Little Foot and Mrs Ples belongs	Australopithecus
The cell organelle to which mRNA attaches during protein synthesis	Ribosome
The position of a gene on a chromosome	locus
The sugar that forms part of a nucleotide in RNA	Ribose
The use of living organisms and their biological processes to improve the quality of human life	biotechnology
Type of variation within a population in which there is a range of intermediate phenotypes	continuous variation
An upright posture and walking only on two legs	bipedalism
A sugar molecule found in a nucleotide of DNA	Deoxyribose
Genetic disorder resulting in the abnormal clotting of blood	Haemophilia
Study of fossils	Palaeontology
Present-day distribution of living organisms across the continents	Biogeography
Family to which humans belong	Hominidae
The organelle in the cytoplasm which is the site of protein synthesis	Ribosome
The name of the bond that forms between amino acids in a protein molecule	Peptide
The process by which a DNA molecule makes identical copies of itself	Replication
The name of the process when homologous chromosome pairs fail to separate during meiosis	Non-disjunction
A testable statement that may be accepted or rejected	Hypothesis
The type of nucleic acid that carries a specific amino acid	tRNA
A diagram showing the inheritance of genetic disorders over many generations	Pedigree
The phase in the cell cycle during which DNA replication occurs	Interphase
The first Homo species to use tools	(Homo) habilis
Undifferentiated cells that can develop into any cell type	stem
A breeding process used for the domestication of plants and animals	Artificial selection
A diagrammatic representation of possible evolutionary relationships amongst species	Phylogenetic tree
The splitting of the cytoplasm during cell division	Cytokinesis
A type of variation where there is a range of phenotypes for the same characteristic	Continuous variation
The present-day distribution of living organisms	Biogeography
Similar structures in different species that show modification by descent	Homologous structures
An individual having two non-identical alleles for a characteristic	heterozygous
The bonds between nitrogenous bases in a DNA molecule	Hydrogen bonds
All the genes that make up an organism	Genome
The type of evidence for human evolution that includes tool-making	cultural evidence
The process whereby new species are formed	speciation
An inherited disorder where blood fails to clot properly	haemophilia
Two or more alternative forms of a gene at the same locus	alleles
The type of variation in a population with no intermediate phenotypes	discontinuous variation