Practice test 1 Flashcards
What evidence supports the cell theory?
A. Living organisms are made up of cells.
B. Unicellular organisms carry out all the functions of life.
C. Multicellular organisms show emergent properties.
D. Cells can develop from inorganic molecules.
Living organisms are made up of cells.
What sort of cells have flagellum, prokaryote or eukaryote?
Both eukaryote and prokaryote.
What causes cell differentiation in multicellular organisms?
The expression of certain genes but not others.
What is the passive movement of particles, such as sodium ions from an area of higher concentration to an area of lower concentration through a protein carrier?
Facilitated diffusion.
How can a change in pH stop an enzyme-catalysed reaction from occurring?
The structure of the enzyme is altered.
During which process is messenger RNA (mRNA) formed?
Transcription.
What is light energy used for in photosynthesis?
To split water molecules.
What is the correct site of anaerobic respiration in test and one of its end products?
Site is cytoplasm and end product is ethanol.
After chorionic villus sampling, how is the material processed for karyotyping?
Homologous chromosomes are paired.
If a woman has three male offspring, what is the probability that her next child will be female?
50%
After gene transfer between species, what ensures that the amino acid sequence of the polypeptide made using the transferred gene remains unchanged?
The genetic code is universal.
In ecology, how is community defined?
Different species living and interacting with each other in a specific area.
What is the phylum of an earth worm?
Annelida
Colonic irrigation involves regularly flushing the large intestine with water. Why should this be avoided?
Vitamin-producing bacteria are eliminated.
Which vessel carries deoxygenated blood from the heart to the lungs?
Pulmonary artery.
