How does potassium move across the membrane of a neuron during repolarization?
FacilitatedDiffusion
What feature of carbon makes it most suitable as a basis for life?
Its bonding properties
How are fats and cholesterol transported in the blood?
As groups of molecules in lipoprotein complexes
Which protein has the highest tensile strength (ability to resist breaking when stretched)?
Spider Silk
What is always passed to the next generation as a result of sexual reproduction?
A haploid set of chromosomes from the mother
When do splitting of centromeres, random assortment of chromosomes or reduction division of chromosomes take place?
Meiosis I and meiosis II
Which genotype would be seen in a person suffering from Huntington’s disease?
Hh
Animals in the highest trophic level of a food chain will often be the largest in body size but will be few in numbers. What accounts for the small numbers?
Energy losses through the food chain
Which conditions favour peat formation?
wet, anaerobic, acidic
Bacteria from chicken feces can cause a loss of intestinal villi in small children who happen to eat dirt in rural villages. Which effect could be expected from such a loss of villi?
Malnutrition
When intense physical activity is anticipated, which factor in the blood will increase the frequency of sinoatrial signals to heart muscle?
Epinephrine
How are the insides of alveoli prevented from sticking together?
Type II pneumocytes providing surfactant
Neural pathways in living brains can now be mapped by tracking the movement of water molecules inside axons. What keeps water molecules inside axons?
Plasma membrane
What releases leptin?
adipose tissue
What happens when pyruvate is converted to acetyl CoA in the link reaction?
decarboxylation
ATP is needed to change products of the carboxylation of ribulosebisphosphate into triose phosphate. What other substance is also needed?
Reduced NADP
What could account for a normal distribution of height in a population?
Multiple genes
The presence of proteins such as albumin in a urine sample indicates kidney damage. Where in the kidney would the damage exist?
Cortex
What contributes to the total DNA content of a zygote?
The DNA of father and mother from their nucleus, and the DNA from mitochondria of mother
What makes thylakoid suitable for photosynthesis?
Has ETC and ATP synthase for photophosphorylation
What is the mode of transportation of triglycerides?
simple diffusion
What is the mode of transportation of amino acids?
co-transport
What is the mode of transportation of monosaccharides?