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Q:

Which helps prevent errors in DNA replication?

A) Complementary base pairing reduce errors B) DNA ligase checks the DNA for errors
C) DNA is located in the ribosomes D) Any base can pair with any other base
 
Answer & Explanation Answer: A) Complementary base pairing reduce errors

Explanation:

DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule. DNA replication occurs in all living organisms acting as the basis for biological inheritance. Complementary base pairing helps prevent errors in DNA replication.

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Q:

The normal blood pressure in human beings is

A) 80/120 B) 120/80
C) 80/110 D) 110/90
 
Answer & Explanation Answer: B) 120/80

Explanation:
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Q:

Which best describes a tetrad?

A) A diploid cell B) Two gametes
C) Four chromatids D) A haploid cell
 
Answer & Explanation Answer: C) Four chromatids

Explanation:

A tetrad is best described by Four chromatids. It is formed from two homologous chromosomes, each consisting of two chromatids in the first stage of meiosis called prophase1.

 

A_tetrad_is_made_up_of1562827273.jpg image

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Q:

The First step of Bacterial Replication is

A) Pinching of the plasma membrane B) Separation of daughter cells
C) Attachment of the DNA to the plasma membrane D) DNA Replication
 
Answer & Explanation Answer: D) DNA Replication

Explanation:

The First step of Bacterial Replication is DNA Replication.

DNA must be copied in order to proceed.

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Q:

The main buffer system of the human blood is

A) H2CO3 B) H2SO4
C) CO2 D) O3
 
Answer & Explanation Answer: A) H2CO3

Explanation:

the_main_buffer_system_of_the_human_blood_is1556690852.jpg image

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Q:

Both food and air travel through the

A) pharynx B) trachea
C) larynx D) alveolus
 
Answer & Explanation Answer: A) pharynx

Explanation:

The pharynx is a passageway shared by both food and air.

 

Both_food_and_air_travel_through_the1562568925.png image

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Q:

Who discovered the monomers of nucleic acids?

A) James Watson, Francis Crick, and Rosalind Franklin B) Friedrich Miescher
C) Phoebus Levene D) Gerardus Johannes Mulder and Jöns Jacob Berxelius
 
Answer & Explanation Answer: C) Phoebus Levene

Explanation:

Deoxyribonucleic acid (DNA) is a nucleic acid polymer composed of monomers called nucleotides. Nucleotides are composed of three components: (1) a pentose sugar; (2) a nitrogenous base; and (3) one to three phosphate groups.

Phoebus Levene, a Russian biochemist was the first to discover the nucleotide and the first to correctly identify the way nucleic acid molecules, DNA.

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Q:

Which letter indicates systolic pressure?

A) i B) b
C) c D) a
 
Answer & Explanation Answer: D) a

Explanation:

a -  at the peak of changes in blood pressure indicates the systiolic pressure.

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