Scientific Reasoning MCQs

Question 1

A bar magnet is placed stationary next to a conducting coil, as shown below.What do we observe in the coil?Choose 1 answer:

Accepted Answer

Nothing happens.

Answer

The magnet feels a force due to the coil.

Answer

A current flows from A to B.

Answer

A current flows from B to A.

Question 2

The following is a diagram of a sarcomere.How do the labelled parts change during muscle contraction?

Accepted Answer

Two "A"s move closer together

Answer

"D" shortens

Answer

"C" stays the same

Answer

"B" shortens

Question 3

For fixed values of wavelength and x, when the slit width was doubled, the distance from the center of the brightest band in the pattern to the center of one of the 2 adjacent dark bands:

Accepted Answer

Was halved.

Answer

Was doubled.

Answer

Remained unchanged.

Answer

Varied with no general trend.

Question 4

The diagram below represents a process that occurs during human reproduction.What is the result of this process (found on the right side of the arrow)?

Accepted Answer

A zygote containing a complete set of genetic information

Answer

A blastocyst containing half of the genetic information

Answer

An embryo containing half of the genetic information

Answer

A gamete containing a complete set of the genetic information

Question 5

Tollen's reagent is an oxidation agent. What are the products of Tollen's reagent reaction with the following molecule?

Accepted Answer

Propanoic acid and Ag

Answer

Propanol and Ag+

Answer

Propanoic acid and Ag+

Answer

Propanol and Ag

Question 6

The figure below is a pedigree that shows the inheritance of a trait, Trait G, in a family. The presence of Trait G in an individual is determined entirely by Gene G. Gene G has 2 alleles: G, which is dominant, and g, which is recessive.Each individual represented in the pedigree was assigned a number (shown below the symbol for the individual) for reference. Scientists determined that the Gene G genotype of Individual 20 is Gg and that the Gene G genotype of Individual 21 is gg. Based on this information, the scientists concluded that Trait G is a dominant trait.Based on the figure, the 2 individuals in which of the following pairs most likely have the greatest genetic similarity across their genomes?

Accepted Answer

Individual 12 and Individual 13

Answer

Individual 3 and Individual 4

Answer

Individual 16 and Individual 24

Answer

Individual 18 and Individual 21

Question 7

Passage IThe figure below is a pedigree that shows the inheritance of a trait, Trait G, in a family. The presence of Trait G in an individual is determined entirely by Gene G. Gene G has 2 alleles: G, which is dominant, and g, which is recessive.Each individual represented in the pedigree was assigned a number (shown below the symbol for the individual) for reference. Scientists determined that the Gene G genotype of Individual 20 is gg and that the Gene G genotype of Individual 21 is Gg. Based on this information, the scientists concluded that Trait G is a recessive trait.Suppose that Individual 23 and Individual 24 have 4 biological children. Based on the figure, how many of the children, if any, have Trait G?

Accepted Answer

4

Answer

0

Answer

1

Answer

3

Question 8

Passage IThe figure below is a pedigree that shows the inheritance of a trait, Trait G, in a family. The presence of Trait G in an individual is determined entirely by Gene G. Gene G has 2 alleles: G, which is dominant, and g, which is recessive.Each individual represented in the pedigree was assigned a number (shown below the symbol for the individual) for reference. Scientists determined that the Gene G genotype of Individual 20 is gg and that the Gene G genotype of Individual 21 is Gg. Based on this information, the scientists concluded that Trait G is a recessive trait.According to the figure, how many of the grand- children of Individual 1 and Individual 2, if any, have Trait G?

Accepted Answer

2

Answer

0

Answer

1

Answer

7

Question 9

Which of the following compounds is the most acidic?Choose 1 answer:

Accepted Answer

Butanol

Answer

2-butanone

Answer

1-butanone

Answer

Butane

Question 10

To the right are drawings of a wide and a narrow cylinder. The cylinders have equally spaced marks on them. Water is poured into the wide cylinder up to the 4th mark (see A). This water rises to the 6th mark when poured into the narrow cylinder (see B).Both cylinders are emptied (not shown) and water is poured into the narrow cylinder up to the 11th mark. How high would this water rise if it were poured into the empty wide cylinder?

Accepted Answer

To about 7 1/3

Answer

To about 7 1/2

Answer

To about 8

Answer

To about 9

Answer

None of these answers is correct

Question 11

DNA molecules are composed of two nucleotide strands coiled together in a double helix. The two strands consist of sugar phosphate backbones which are connected by pairs of bases. The DNA molecules may be illustrated as follows. The two most common sugars found in the nucleic acids are

Accepted Answer

Ribose and deoxyribose

Answer

Sucrose and ribose

Answer

Deoxyribose and glucose

Answer

Glucose and fructose

Question 12

DNA molecules are composed of two nucleotide strands coiled together in a double helix. The two strands consist of sugar phosphate backbones which are connected by pairs of bases. The DNA molecules may be illustrated as follows. Which of the following is the correct matching of base pairs in DNA?

Accepted Answer

Adenine - Thymine and Guanine - Cytosine

Answer

Guanine - Thymine and Adenine - Cytosine

Answer

Adenine - Guanine and Thymine - Uracil

Answer

Guanine - Cytosine and Thymine - Uracil

Question 13

DNA molecules are composed of two nucleotide strands coiled together in a double helix. The two strands consist of sugar phosphate backbones which are connected by pairs of bases. The DNA molecules may be illustrated as follows. DNA replication involves the breaking of bonds between

Accepted Answer

Two bases

Answer

Sugars and a base

Answer

Phosphate and a base

Answer

Sugars and phosphates

Question 14

DNA molecules are composed of two nucleotide strands coiled together in a double helix. The two strands consist of sugar phosphate backbones which are connected by pairs of bases. The DNA molecules may be illustrated as follows. Recombinant DNA is defined as a DNA produced from

Accepted Answer

DNA of two different organisms

Answer

RNA and protein

Answer

Viral DNA and glucose

Answer

DNA and haemoglobin

Question 15

Based on perturbations in Neptune's orbit, the search for a ninth planet was conducted and Pluto was discovered in 1930. Pluto orbits the sun just like the other eight planets, and it has a moon. Charon, and a stable orbit. Based on its distance from the sun, Pluto should be grouped with the planets known as gas giants. In addition, Pluto, like the planet Mercury, has little or no atmosphere. Pluto is definitely not a comet because it does not have a tail like a comet when it is near the sun. Pluto is also not an asteroid, although its density is closer to an asteroid than to any of the other planets. Pluto is a planet because it has been classified as one for more than sixty years since its discovery.Which argument supporting the classification of Pluto as a planet is the weakest?

Accepted Answer

Pluto has been classified as a planet for more than sixty years since discovery

Answer

Pluto orbits the sun just like the other eight planets

Answer

Pluto has a moon

Answer

Pluto has a stable orbit

Answer

Pluto, like the planet Mercury, has little or no atmosphere

Question 16

Based on perturbations in Neptune's orbit, the search for a ninth planet was conducted and Pluto was discovered in 1930. Pluto orbits the sun just like the other eight planets, and it has a moon. Charon, and a stable orbit. Based on its distance from the sun, Pluto should be grouped with the planets known as gas giants. In addition, Pluto, like the planet Mercury, has little or no atmosphere. Pluto is definitely not a comet because it does not have a tail like a comet when it is near the sun. Pluto is also not an asteroid, although its density is closer to an asteroid than to any of the other planets. Pluto is a planet because it has been classified as one for more than sixty years since its discovery.Which of the following statements is not backed with an explanation?

Accepted Answer

Pluto is not an asteroid

Answer

Pluto is like a planet

Answer

Pluto should be grouped with planets known as gas giants

Answer

Pluto is like Mercury

Answer

Pluto is not a comet

Question 17

Predation is an interaction between individuals of 2 species in which one is harmed (the prey), and the other is helped (the predator). Predation can occur among plants and animals as well as between plants and animals. Some biologists contend that herbivores, or plant eaters, are predators. Table 1 indicates some characteristics and examples of certain predators. Predation is very important in maintaining a natural balance in any given ecosystem. For example, without predators, prey populations tend to grow exponentially. Without prey, predator populations tend to decline exponentially. Predators consume individual members of the prey population, thereby controlling the overall numbers in the ecosystem. The number of prey consumed depends on the number of prey present as well as the number of predators present. The rate of change in the number of prey is a function of the birth of new prey minus the death of other prey, due either to predation or other causes. The death rate is assumed to depend on the number of prey available and the number of predators. The rate of change in the number of predators is a function of the births of new predators-which depends on the number of prey-minus the death of some predators. Over long periods of time, predator and prey tend to balance each other out. This is called the predator-prey cycle. Prey numbers will increase when predator numbers decrease. When the number of prey reaches a certain point, predators will start to increase until they eat enough prey to cause a decline in prey numbers. When this happens, the number of predators will begin to decrease because they can't find enough prey to eat, and the cycle will begin again. Figure 1 represents an example of a predator-prey cycle.Based on information in the passage and in Table 1, an herbivore is:

Accepted Answer

Both a predator and prey

Answer

A predator only

Answer

Both a parasite and a predator

Answer

Prey only

Question 18

Predation is an interaction between individuals of 2 species in which one is harmed (the prey), and the other is helped (the predator). Predation can occur among plants and animals as well as between plants and animals. Some biologists contend that herbivores, or plant eaters, are predators. Table 1 indicates some characteristics and examples of certain predators. Predation is very important in maintaining a natural balance in any given ecosystem. For example, without predators, prey populations tend to grow exponentially. Without prey, predator populations tend to decline exponentially. Predators consume individual members of the prey population, thereby controlling the overall numbers in the ecosystem. The number of prey consumed depends on the number of prey present as well as the number of predators present. The rate of change in the number of prey is a function of the birth of new prey minus the death of other prey, due either to predation or other causes. The death rate is assumed to depend on the number of prey available and the number of predators. The rate of change in the number of predators is a function of the births of new predators-which depends on the number of prey-minus the death of some predators. Over long periods of time, predator and prey tend to balance each other out. This is called the predator-prey cycle. Prey numbers will increase when predator numbers decrease. When the number of prey reaches a certain point, predators will start to increase until they eat enough prey to cause a decline in prey numbers. When this happens, the number of predators will begin to decrease because they can't find enough prey to eat, and the cycle will begin again. Figure 1 represents an example of a predator-prey cycle.Based on Figure 1, during the first year, predator numbers were mostly:

Accepted Answer

Higher than prey numbers.

Answer

Lower than prey numbers.

Answer

Equal to prey numbers.

Answer

Unable to be determined.

Question 19

Predation is an interaction between individuals of 2 species in which one is harmed (the prey), and the other is helped (the predator). Predation can occur among plants and animals as well as between plants and animals. Some biologists contend that herbivores, or plant eaters, are predators. Table 1 indicates some characteristics and examples of certain predators. Studies have shown that a certain species of deer will only eat a specific type of plant found in the deer's nat- ural habitat, and nothing else. Is this finding supported by the information in the passage?

Accepted Answer

Yes, because a deer is an herbivore, and herbivores can be selective eaters

Answer

No, because a deer is an herbivore, which means it eats all plants

Answer

No, because a deer is a carnivore and does not eat plants

Answer

Yes, because a deer is a prey animal, so it must use caution when eating

Question 20

Predation is an interaction between individuals of 2 species in which one is harmed (the prey), and the other is helped (the predator). Predation can occur among plants and animals as well as between plants and animals. Some biologists contend that herbivores, or plant eaters, are predators. Table 1 indicates some characteristics and examples of certain predators. Based on Figure 1, during which year were the greatest number of prey animals available?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Free Scientific Reasoning MCQs with Answers