Question 1

Which part of the respiratory system does emphysema damage?

Accepted Answer

Emphysema is a condition that involves damage to the walls of the air sacs (alveoli) of the lung i.e, primarily causes shortness of breath due to over-inflation of the alveoli. First, emphysema causes holes to gradually form inside the lungs' air sacs, thereby weakening their internal structure and inhibiting the exchange of oxygen and carbon dioxide.

Question 2

All cells divide at the same rate.

Accepted Answer

The given statement that all cells divide at the same rate is FALSE. No, all cells do not divide at the same rate. Cells that require frequent replenishing, such as skin or intestinal cells, may only take roughly twelve hours to complete a cell cycle. Other cells, such as liver cells, remain in a resting state (interphase) for up to a year before undergoing division.

Question 3

Where are chromatids found in a cell?

Accepted Answer

A chromatid is one copy of a newly copied chromosome which is still joined to the original chromosome by a single centromere. The two identical copies—each forming one half of the replicated chromosome are called chromatids. Chromonema is the fibre-like structure in prophase in the primary stage of DNA condensation. In metaphase, they are called chromatids.

Question 4

Transcription occurs in the

Accepted Answer

Nucleus

Question 5

What three statements make up the cell theory?

Accepted Answer

The three statements make up the cell theory are:: 1. All living things are made up of cells. 2. Cells are the basic unit of structure/function in living things. 3. New cells come frome exisiting cells. These cells can vary widely, but all living things are composed of cells.

Question 6

What base is found in RNA but not in DNA?

Accepted Answer

Uracil

Question 7

Air in the pleural cavity is called a pneumothorax.

Accepted Answer

Air or gas can build up in the pleural space and when this happens, it's called a pneumothorax. Hence the given statement is TRUE.

Question 8

Which of the following statements is not true about metabolism?

Accepted Answer

Metabolism is the set of life-sustaining chemical transformations within the cells of organisms. The three main purposes of metabolism are the conversion of food/fuel to energy to run cellular processes, the conversion of food/fuel to building blocks for proteins, lipids, nucleic acids, and some carbohydrates, and the elimination of nitrogenous wastes. Younger people have faster metabolism than adults. Hence, the given statement 'Younger people generally have a slower metabolism than adults' is FALSE.

Question 9

Which best describes Genes?

Accepted Answer

Gene is a segment of chromosomal DNA or a sequence of DNA or RNA that codes for a molecule that has a function. It is the basic physical and functional unit of heredity. As genes are made up of DNA it impies that they are long, double chains of nucleic acids as DNA is made of nucleic acids.

Question 10

What is the purpose of the sigmoid colon?

Accepted Answer

Sigmoid colon or pelvic colon is a curved, S-shaped portion of the large intestine which is closest to the rectum and anus * It helps to transports fecal matter from the descending colon to the rectum and anus * It is the final segment of the colon

Question 11

Which of the following is true of kinetochores?

Accepted Answer

They are the sites at which microtubules attach to chromosomes.

Question 12

Which one of the following is true of tRNAs?

Accepted Answer

tRNA abbreviated as A transfer RNA is an adaptor molecule composed of RNA, typically 76 to 90 nucleotides in length, that serves as the physical link between the mRNA and the amino acid sequence of proteins.

Question 13

Non-Gonococcal Urethritis is most often caused by

Accepted Answer

Chlamydial infection is very common in both males and females. NGU (Non-Gonococcal Urethritis) is an infection of the urethra caused by pathogens (germs) other than gonorrhea. Several types of germs cause NGU. The most common and serious is chlamydia.

Question 14

The schwann cell forms a myelin sheath around the

Accepted Answer

Schwann cells or neurolemmocytes are the cells in the peripheral nervous system that form the myelin sheath around a neuron's axon.

Question 15

Major fructose sources include

Accepted Answer

Major fructose sources include all fruits and honey.

Question 16

In recombinant DNA methods, the term vector can refer to

Accepted Answer

The term 'Vector' in recombinant DNA methods, refers to a plasmid or other agent used to transfer DNA into a living cell.

Question 17

Which of the following defines a genome?

Accepted Answer

the complete set of an organism's genes and other DNA sequences

Question 18

Which chemical is not found in DNA nucleotides?

Accepted Answer

A nucleotide is an organic molecule that is the building block of DNA and RNA. They also have functions related to cell signaling, metabolism, and enzyme reactions. A nucleotide is made up of three parts: a phosphate group, a 5-carbon sugar, and a nitrogenous base. The four nitrogenous bases in DNA are adenine, cytosine, guanine, and thymine. RNA contains uracil, instead of thymine. A nucleotide within a chain makes up the genetic material of all known living things.

Question 19

During the process of protein synthesis, each trna carries one

Accepted Answer

During protein synthesis process, each tRNA carries one aminoacid for protein synthesis to the ribosomes.

Question 20

Which best describes a gene?

Accepted Answer

Gene is a hereditary unit consisting of a sequence of DNA that occupies a specific location on a chromosome and determines a particular characteristic in an organism. In short it is a piece or segment of chromosome. Genes undergo mutation when their DNA sequence changes.

Biology Questions