Question 1

Which of the following statements about DNA replication is true?

Accepted Answer

Single‑strand binding proteins stabilize the open conformation of the unwound DNA.

Question 2

Tubes that bifurcate from the windpipe

Accepted Answer

Tubes that bifurcate from the windpipe are called Bronchi.

Question 3

Which describes how mRNA is used by a cell?

Accepted Answer

A RNA copy of a DNA gene is called as messenger RNA or mRNA. mRna is used in translation because information is translated from one language (nucleotides) into another (amino acids). Hence, mRNA is used to transfer genetic information by a cell.

Question 4

Where does most digestion take place?

Accepted Answer

The digestion process starts in the mouth and the complete digestion process completes in the small intestine where all the nutrients in the food are absorbed.

Question 5

Enzymes are important because they

Accepted Answer

Enzymes in the body are those which play an important role of breaking down the larger molecules to small and speeds up the chemical reactions.

Question 6

Which best describes the structure of a DNA molecule?

Accepted Answer

DNA is not a single stranded and does not have amino acids. Hence options, b & C are eiminated. Dna is a double helix structure containing nucleobase—either cytosine (C), guanine (G), adenine (A), or thymine (T)—as well as a monosaccharide sugar called deoxyribose and a phosphate group.

Question 7

Blood plasma is filtered in

Accepted Answer

the renal capsule

Question 8

Which of these statements is true of the kingdom protista?

Accepted Answer

All are eukaryotic

Question 9

The blind spot of the eye is where the optic nerve leaves the eyeball.

Accepted Answer

TRUE

Question 10

What is the structural unit of compact bone?

Accepted Answer

Osteon

Question 11

Which RNA base pairs with the adenine in DNA?

Accepted Answer

In DNA, adenine pairs with Thymine. Similarly, in RNA, due to absence of thymine in RNA and the same structure with uracil helps to pair with adenine.

Question 12

The temperature danger zone for food is

Accepted Answer

The temperature danger zone for the food that cannot be stored for long time is between 5 degrees to 63 degrees centigrade.

Question 13

Innate immune system defenses include

Accepted Answer

phagocytosis

Question 14

Protists and bacteria are grouped into different domains because

Accepted Answer

protists have a membrane-bounded nucleus, which bacterial cells lack.

Question 15

Which base is found only in RNA?

Accepted Answer

Uracil

Question 16

Skin is an example of what type of tissue?

Accepted Answer

Epithelial tissue is made of layers of cells that cover the surfaces of the body that come into contact with the exterior world, line internal cavities, and form glands. The four types of tissue in the body are epithelial, connective, muscle, and nervous.

Question 17

Receptors for hearing are located in the

Accepted Answer

Cochlea

Question 18

What are the four bases that make up DNA?

Accepted Answer

A DNA is made up of four bases called Adenine, Thymine, Cytosine and Guanine

Question 19

Which of the following is a risk factor for osteoporosis?

Accepted Answer

Osteoporosis makes you more likely to loss bone mass and density resulting in fractures. Smoking cigarettes and drinking alcohol can lead to loss bone mass and density. Oseoporosis is more common in women than men.

Question 20

Which statements about viruses are true?

Accepted Answer

The statements true about viruses are : 1. The capsid enters the host cell if the virus is enveloped. 2. Enveloped viruses bud from the host cell. 3. HIV contains reverse transcriptase. 4. A retrovirus contains RNA.

Biology Questions