Majorship: Science Practice Questions — Set 1

Question 1

During DNA replication, which enzyme is responsible for unwinding the double helix at the replication fork by breaking the hydrogen bonds between nitrogenous bases?

Accepted Answer

DNA Helicase

Answer

DNA Polymerase III

Answer

DNA Ligase

Answer

RNA Primase

Question 2

How many moles of oxygen gas (O2) are required to completely react with 4.0 moles of propane (C3H8) during combustion (C3H8 + 5O2 -> 3CO2 + 4H2O)?

Accepted Answer

20.0 moles

Answer

12.0 moles

Answer

4.0 moles

Answer

9.0 moles

Question 3

In the photoelectric effect, what happens to the emitted electrons if the frequency of the incident light is increased while keeping the intensity constant?

Accepted Answer

The maximum kinetic energy of the electrons increases.

Answer

The speed of the electrons decreases due to higher frequency.

Answer

The stopping potential remains unchanged.

Answer

The number of emitted electrons per second increases.

Question 4

Which geological era is known as the "Age of Reptiles," characterized by the dominance of dinosaurs and the appearance of the first birds and mammals?

Accepted Answer

Mesozoic Era

Answer

Precambrian Eon

Answer

Cenozoic Era

Answer

Paleozoic Era

Question 5

In aerobic cellular respiration, which process occurs in the mitochondrial matrix and generates the most electron carriers (NADH and FADH2)?

Accepted Answer

The Krebs Cycle

Answer

The Electron Transport Chain

Answer

Glycolysis

Answer

Lactic Acid Fermentation

Question 6

Which of the following elements has the highest first ionization energy?

Accepted Answer

Helium

Answer

Fluorine

Answer

Cesium

Answer

Neon

Question 7

What is the theoretical maximum efficiency of a heat engine operating between a hot reservoir at 600 K and a cold reservoir at 300 K?

Accepted Answer

50%

Answer

33%

Answer

75%

Answer

100%

Question 8

In certain flowers, a cross between a homozygous red flower and a homozygous white flower produces all pink offspring. Which type of inheritance pattern does this demonstrate?

Accepted Answer

Incomplete Dominance

Answer

Codominance

Answer

Polygenic Inheritance

Answer

Multiple Alleles

Question 9

Which functional group is characterized by a carbonyl group (C=O) bonded to at least one hydrogen atom, usually found at the end of a carbon chain?

Accepted Answer

Aldehyde

Answer

Ketone

Answer

Ester

Answer

Carboxylic Acid

Question 10

What is the final evolutionary stage for a star with a mass similar to our Sun after it sheds its outer layers as a planetary nebula?

Accepted Answer

White Dwarf

Answer

Red Dwarf

Answer

Black Hole

Answer

Neutron Star

Majorship: Science Practice Questions — Set 1

During DNA replication, which enzyme is responsible for unwinding the double helix at the replication fork by breaking the hydrogen bonds between nitrogenous bases?

How many moles of oxygen gas (O2) are required to completely react with 4.0 moles of propane (C3H8) during combustion ( $C 3 H 8 + 5 O 2$ -> 3CO $2 + 4 H 2 O$ )?

In the photoelectric effect, what happens to the emitted electrons if the frequency of the incident light is increased while keeping the intensity constant?

Which geological era is known as the "Age of Reptiles," characterized by the dominance of dinosaurs and the appearance of the first birds and mammals?

In aerobic cellular respiration, which process occurs in the mitochondrial matrix and generates the most electron carriers (NADH and FADH2)?

Which of the following elements has the highest first ionization energy?

What is the theoretical maximum efficiency of a heat engine operating between a hot reservoir at 600 K and a cold reservoir at 300 K?

In certain flowers, a cross between a homozygous red flower and a homozygous white flower produces all pink offspring. Which type of inheritance pattern does this demonstrate?

Which functional group is characterized by a carbonyl group $(C = O)$ bonded to at least one hydrogen atom, usually found at the end of a carbon chain?

What is the final evolutionary stage for a star with a mass similar to our Sun after it sheds its outer layers as a planetary nebula?

Majorship: Science Practice Questions — Set 1

During DNA replication, which enzyme is responsible for unwinding the double helix at the replication fork by breaking the hydrogen bonds between nitrogenous bases?

How many moles of oxygen gas (O2) are required to completely react with 4.0 moles of propane (C3H8) during combustion (C3H8+5O2 -> 3CO2+4H2O)?

In the photoelectric effect, what happens to the emitted electrons if the frequency of the incident light is increased while keeping the intensity constant?

Which geological era is known as the "Age of Reptiles," characterized by the dominance of dinosaurs and the appearance of the first birds and mammals?

In aerobic cellular respiration, which process occurs in the mitochondrial matrix and generates the most electron carriers (NADH and FADH2)?

Which of the following elements has the highest first ionization energy?

What is the theoretical maximum efficiency of a heat engine operating between a hot reservoir at 600 K and a cold reservoir at 300 K?

In certain flowers, a cross between a homozygous red flower and a homozygous white flower produces all pink offspring. Which type of inheritance pattern does this demonstrate?

Which functional group is characterized by a carbonyl group (C=O) bonded to at least one hydrogen atom, usually found at the end of a carbon chain?

What is the final evolutionary stage for a star with a mass similar to our Sun after it sheds its outer layers as a planetary nebula?

How many moles of oxygen gas (O2) are required to completely react with 4.0 moles of propane (C3H8) during combustion ( $C 3 H 8 + 5 O 2$ -> 3CO $2 + 4 H 2 O$ )?

Which functional group is characterized by a carbonyl group $(C = O)$ bonded to at least one hydrogen atom, usually found at the end of a carbon chain?