Question 1

What are the sides of the dna ladder made of

Accepted Answer

DNA is a double-stranded molecule twisted into a helix. The shape of DNA is a double helix, which is like a twisted ladder. The sides of the ladder are made of alternating sugar and phosphate molecules. Deoxyribose, which is a pentose, and a phosphate group are the two molecules together form the two sides of the DNA. The rungs of the ladder are pairs of 4 types of nitrogen bases.

Question 2

Study of fishes is called

Accepted Answer

Ichthyology is the branch of biology devoted to the study of fish. It is also known as Fish science which includes bony fishes (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha).

Question 3

The concept of carbon credit originated from

Accepted Answer

The concept of carbon credit for manufacturers originated with the Kyoto Agreement (Protocol) of 1997.

Question 4

The term biodiversity refers to

Accepted Answer

The term biodiversity refers to the variety of life on Earth at all its levels, from genes to ecosystems, and the ecological and evolutionary processes that sustain it.

Question 5

Which of the following CANNOT be considered a single phase?

Accepted Answer

A pure solid and a pure liquid are definitely a single phase because they are so united, or homogeneous. This leads to a homogeneous mixture also being a single phase. Hence, the option that cannot be considered a single phase is A. a heterogeneous mixture.

Question 6

The 'P' in DPT stands for

Accepted Answer

DPT refers to a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis, and tetanus. Pertussis refers to whooping cough.

Question 7

Which of the following is biodegradable?

Accepted Answer

Biodegradable substances can be broken down into simpler, harmless substances in nature with due course of time by the biological process such as action of microbes. They can be recycled as a part of food chain. Here, Leather bags are biodegradable.

Question 8

MONEX is associated with

Accepted Answer

Monsoon experiment is abbreviated as MONEX. The Monsoon Experiment is the core of the GARP Monsoon Subprogramme, which is a major international effort to achieve a better understanding of the Planetary monsoon circulation, the major seasonal perturbation of the general circulation of the atmosphere and the influence of the annual cycle of precipitation associated with the monsoon on the agriculture of the many populous nations of the region. Hence, MONEX is associated with The Monsoon Experiment.

Question 9

What is the principle carbohydrate of milk?

Accepted Answer

Lactose is the major carbohydrate in the milk of most species. Lactose is a disaccharide composed of the monosaccharides D-glucose and D-galactose, joined in a ß-1,4-glycosidic linkage. The chemical name for lactose is 4-0-ß-D-galactopyranosyl-D-glucopyranose.

Question 10

Pluto dwells on the inner edge of the

Accepted Answer

Pluto dwells on the inner edge of the The Kuiper belt which is a belt of asteroids that lies on the outer edge of the solar system. Pluto is a dwarf planet that is supposed to be no longer a planet and is still considered a planet because of its history in the solar system. It takes 248 years to make one orbit around the sun. As to where it is, depends on time.

Question 11

The term "simple carbohydrates" refers to

Accepted Answer

Simple carbohydrates are also called as Simple sugars. Monosaccharides and Disaccharides refers to simple carbohydrates.

Question 12

What gas makes up most of the atmosphere?

Accepted Answer

Our atmosphere is made up of 78% Nitrogen, 21% Oxygen and 1% all other gases like argon, carbon dioxide, neon, and helium. So, Nitrogen makes up the majority of our atmosphere.

Question 13

What type of macromolecule is DNA?

Accepted Answer

DNA stands for Deoxyribo nucleic acid. It is a nucleic acid made up of monomeric unit called Nucleotide. A nucleotide consist of - a) Sugar - Deoxyribose in DNA ( ribose in RNA) b) An organic base- Adenine, cytosine, guanine.

Question 14

The hot holding temperature for potentially hazardous foods must be

Accepted Answer

Potentially hazardous foods are foods that might contain food poisoning bacteria and are capable of supporting growth of these bacteria or formation of toxins to levels that are unsafe for consumers, if the foods are not stored at correct temperatures. Toxins are poisonous chemicals produced by some types of bacteria. The food can be left at room temperature until it reaches 60 deg C because food-poisoning bacteria will not multiply at 60 deg C or above. However, do not leave food cooling at room temperature unless you are sure that the temperature of the food is still at least above 60 C.

Question 15

Which of the following is an air pollutant?

Accepted Answer

Air pollutants are solid particles, gases, and liquid droplets in the air that can adversely affect ecosystems and the health of humans. Major ambient air pollutants include toxic metals, polycyclic aromatic hydrocarbons, benzene, particulate matter (PM), nitrogen oxides, sulfur oxides, carbon monoxide, and ozone. Power plants, factories, and vehicle and air traffic are the most important anthropogenic sources of air pollution. In addition, natural sources such as wildfires and volcanic activity contribute to ambient air pollution.

Question 16

Which is a density independent factor in controlling a population?

Accepted Answer

Any factor limiting the size of a population whose effect is not dependent on the number of individuals in the population, then such factor is called Density Independent Factor. It is things that the organisms have no control over. Here in the given options, food shortage and disease are factors that are dependent on the number of population but Floods have no dependency. Some examples of density independent factors are :: Earth quake, fires, volcanic eruptions, floods, and all natural calamities.

General Science Questions