Mathematical tools
Biology
Chemistry
Physics
100
what is the metric prefix for 10^-6?
Micro (μ)
100
Describe the difference between anabolic and catabolic pathways and give an example of each.
Anabolic pathways build bigger molecules from smaller ones and require energy. Example: Protein synthesis.
Catabolic pathways break down large molecules into smaller ones, releasing energy. Example: Cellular respiration.
100
What is the explanation of the malleability of metals?
Bonds involve free electrons
100
What is the unit of acceleration?
m/s^2
200
What are the 7 main SI units called?
Kelvin(K), meter(m), ampere(A), second(s), mole, kilogram(kg), candela(cd)
200
Explain how adhesion and cohesion contribute to water transport in plants.
Adhesion is when water sticks to other things, It's like how a magnet sticks to metal. In plants, water sticks to the tubes, helping it move up.
-Cohesion is when water molecules stick together. Water molecules hold onto each other tightly, making a chain. This chain helps pull water up the plant.
200
What is the condensed electronic configuration of Cr?
[Ar] 4s^1 3d^5
200
In a distance-time graph, what can a decrease in the graph’s curve/gradient indicate about the object’s speed?
the speed is decreasing
300
You are measuring the length and width of a rectangle using a ruler with an uncertainty of ±0.1 cm. The length is measured as 10.0 cm and the width as 5.0 cm. Calculate the uncertainty in the area of the rectangle.
10.0 cm x 5.0 cm = 50.0 cm²
300
An individual suffering from hypoglycemia would be recommended to consume glucose before eating starchy food due to glucose being easy to drink and glucose being the main energy delivered by our body. Outline how the structure of galactose and glucose differ from each other
4th carbon
300
What is the lewis structure of sulfur dioxide?
300
A runner ran a 660-meter field in 44 seconds. If his speed in the first half was twice his speed in the second half of his run, what was his speed both in the first and the second half?
20m/s in the first half, and 10m/s in the second
400
A chemist is measuring the volume of a liquid and the actual volume is 250 mL. However, due to equipment error, the measured volume is 246 mL. Calculate the percentage error.
4 mL / 250 mL) x 100 = 1.6%
400
Explain the chemical difference between trans and cis fatty acids and how it affect their properties.
The chemical difference between trans and cis fatty acids lies in the arrangement of hydrogen atoms around the double bond in their carbon chain.
Trans Fatty Acids: Hydrogen atoms are on opposite sides of the double bond.
Cis Fatty Acids: Hydrogen atoms are on the same side of the double bond.
This difference affects their properties:
Trans Fatty Acids: Have a straighter shape, similar to saturated fats, making them solid at room temperature and less susceptible to oxidation.
Cis Fatty Acids: Have a bent shape due to the cis configuration, making them liquid at room temperature (oils) and more prone to oxidation.
400
Explain how the formation of cations and anions leads to the creation of ionic compounds
Opposite charges on ions cause bonding by electrostatic force
400
An aerodynamic object was thrown from a plane, flying at a height of 11000 meters. The plane was flying at a bearing of 29 degrees from the north, with a speed of 700 km/h. If we assume that Earth’s gravitational pull is 10m/s, how far will the ball travel, in meters, from the point where it was dropped from the plane? (note that conversion from km/h to km/s is divided by 3600)
213900m
(object will fall for 1100 seconds.
convert 700 kmh to km/s, 700/3600
700/3600 is the speed in km/s. object will fall for 1100 seconds, and to find distance, multiply 700/3600 by 1100, and then by 100 to convert to meters
500
what are the steps for multiplying/dividing uncertainties?
Change absolute uncertainty into percentage
Multiply numbers and add percentage uncertainties
Change percentage uncertainty into the fractional uncertainty
Change percentage uncertainty into the fractional uncertainty
Multiply result and fractional uncertainty
result of this multiplication is an answer
Uncertainty should be in one significant figure
500
Describe how RNA differs from DNA
DNA contains deoxyribose sugar, RNA contains ribose sugar
DNA uses adenine (A), thymine (T), cytosine (C), and guanine (G) as its bases.,RNA uses adenine (A), uracil (U), cytosine (C), and guanine (G), with uracil replacing thymine.
DNA is typically double-stranded, forming a double helix.
RNA is usually single-stranded and can fold into various shapes.
500
Define the term "induced dipole interactions" and explain how they arise in non-polar molecules.
It is a weak intermolecular force that arises between nonpolar molecules. That interaction happens due to temporary electrostatic interaction in electrons. As electrons constantly move, for a temporary time electrons will be on opposite sides resulting in attraction
500
A race car accelerates in a 500-meter-long race track uniformly from 66.6 km/h to 0.0461 km/s in 2.47 seconds. Determine the acceleration of the car and the distance traveled.
(note that meters/second to km/h conversion is the value * 3.6)
ans: 66.6/3.6 to convert to m/s
0.0461km/s multiplied by 1000 to convert to m/s
46.1m/s - 18.5m/s
27.6m/s / 2.47
seconds = 11.2 m/s^2