Interactive NAT Grade 10 Reviewer (Science) Part 4

1➤ What are the building blocks of proteins?

amino acid fatty acid glucose nucleotides

2➤ What is the molecule that serves as the “blueprint” of life?

deoxyribonucleic acid messenger RNA ribonucleic acidtransfer RNA

3➤ What are the nitrogenous bases in DNA?

adenine, cytosine, uracil only adenine, cytosine, thymine only adenine, cytosine, guanine, thymine adenine, cytosine, guanine, uracil

4➤ Which is the correct complement pairing of bases in DNA?

adenine-guanine, cytosine-guanine adenine-cytosine, guanine-thymine adenine-thymine, cytosine-guanine uracil adenine, cytosine-guanine

5➤ Which of the following sequences of DNA bases is complementary to the sequence: ATC-GTG-CCC

TAG-CAC-GGG TAG-TAT-GGG AUG-CAC-GGGAUG-TAT-GGG

6➤ What do you call the genetic mutation that causes a codon that should code for a specific amino acid to be changed into a stop codon ?

a chromosomal mutationa frame shift mutation.. a nonsense mutation silent mutation.

7➤ A genetic mutation that does not result in a change in the amino acid sequence of the resulting protein is called

a chromosomal mutation. a frame shift mutation. a nonsense mutation.a silent mutation.

8➤ This is a mutation that causes a section of the chromosome to be broken out and reinserted backwards. This is known as

deletioninsertioninversiontranslocation

9➤ Persons with Down syndrome usually have ______ copies of chromosome 21.

no one two three

10➤ If a segment of a chromosome is present several times more than normal due to unequal crossing-over, it is called ________.

a deletion duplication an inversion a translocation

11➤ An adaptation promotes ________.

chance to survivechance to reproduce chance to survive and reproduce None of the above

12➤ The criterion used to determine if an organism is a new species is based on ________.

time geography reproductionphysical traits

13➤ Where can most fossils be found?

Black soilLava flows Granite rock Sedimentary rock

14➤ Vertebrate forelimbs are most likely to be discussed in ________.

Ecology Embryology BiogeographyComparative anatomy

15➤ Which of the following statements does NOT describe Darwin's theory of natural selection?

The members of a population of the organisms will strive. Populations tend to replicate in minimal numbers. Members of a population have genetic differences. Some members of a inhabitants have adaptive behaviors.

16➤ Which of the following describes mutation?

A result of inbreeding. Any change in the structure of chromosomes. Change in gene pool due to migration. Differential survival and reproduction of organisms.

17➤ What agent of evolutionary change can result to a population with limited variation due entirely to chance?

Mutation Gene flow Genetic driftInbreeding

18➤ What do you call the process that results to the formation of new species because of evolution?

Speciation Mutation ReproductionMigration

19➤ Who is the first evolutionist to believe that organisms change?

Jean Baptiste de Lamarck Richard Dawkins Charles DarwinSteve Jones

20➤ It is commonly observed in plants and in some kinds of animals and a very good example of non-random mating.

Genetic drift Inbreeding Gene flowMutation

21➤ When a change occurs in the environment, what will organisms do?

adapt adapt, migrate or die die migrate or die

22➤ Which of the following is an ecosystem?

rice field sunlight temperature thunderstorm

23➤ A person breeds rabbits in a cage. After a few generations, the breeder observes that the rabbits are more aggressive towards each other, the young are less healthy and more young rabbits die. What do you think will happen to the population of rabbits?

The population will not be affected. The population will decrease. The population will increase. The population will remain the same.

24➤ What is the significance of species diversity?

High species diversity tends to be more productive and sustainable. High species diversity tends to create chaos in an ecosystem. More diverse ecosystem has lesser ability to withstand environmental stressors. Species minimize interaction with their environment, thus perform certain functions.

25➤ Why are invasive species a threat to biodiversity?

They can be of help to other organisms. They can be beneficial to humans. They can increase the number of resources. They can outcompete native organisms for their resources.

26➤ Which is the adverse effect of high fertility and rapid population growth?

Over supply of job opportunities Effects of large families on child development Less urbanization and crowding Increased equalities in education

27➤ The statement “250 individuals per square kilometer” most likely refers to _________.

population population density population distribution population growth

28➤ Which of the following causes a decreasing wildlife population in most of the places in our country?

Loss of limiting factor Loss of natural disturbancesLoss of habitat Loss of carrying capacity

29➤ Based on the given statements, how will you describe the yearly percentage change of Philippine population growth in the last four years?

I. The current population of Philippines in 2021 is 111,046,913, a 1.34% increase from 2020.

II. The population of Philippines in 2020 was 109,581,078, a 1.35% increase from 2019.

III. The population of Philippines in 2019 was 108,116,615, a 1.37% increase from 2018.

IV. The population of Philippines in 2018 was 106,651,394, a 1.41% increase from 2017.

The Philippine population growth is stable. The Philippine population growth is decreasing. The Philippine population growth increases rapidly. The Philippine population growth increases slowly.

30➤ A limiting factor is an environmental condition that restricts the growth distribution of a population within an ecosystem. Which of the following limiting factors would increase due to the number of individuals in a population?

increase temperature disease natural disaster unusual weather

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