Question 1

Which of the following is not a function of cytoskeleton in a cell ?

Accepted Answer

A cytoskeleton is the frame that gives shape to a cell. And also it offers support, and facilitates movement through three main components: microfilaments, intermediate filaments, and microtubules. The cytoskeleton helps the cell move in its environment and controls the movement of all of the cell's interior workings.

Question 2

Which of the following is considered a modified stem?

Accepted Answer

Tuber is considered as a modified stem. These type of stems carry out special functions that are important for the plant to survive. Tubers serves as a food reserve and bearing buds wherein new plants can grow.

Question 3

Which statement describes decomposers?

Accepted Answer

Decomposers are organisms that break down dead or decaying organisms, and in doing so, they carry out the natural process of decomposition. The statement "Decomposers are those organisms that recycle matter in the ecosystem" describes decomposers.

Question 4

Where in the cell are chromosomes located?

Accepted Answer

In all plants and animal cells chromosomes are located in the Nucleus of the cells. The Chromosomes are thread like structures present in the nucleus of the cells which are made up of proteins and a single molecule of DNA. Their function is to carry the characteristic features of parent cells to daughter cells.

Question 5

The inherited traits of an organism are controlled by

Accepted Answer

The inherited traits of an organism are controlled by DNA molecules. The traits an organism displays are ultimately determined by the genes it inherited from its parents, in other words by its genotype. Animals have two copies of all their chromosomes, one from each parent.

Question 6

Where is glucose stored in the body?

Accepted Answer

In human body, glucose is stored in blood stream before it is converted to glycogen. Excess glucose is stored in the form of fats. After conversion, glycogen is stored in Muscles and Liver.

Question 7

Origins of genetic variation

Accepted Answer

Random mutations are the ultimate source of genetic variation. Mutations are likely to be rare and most mutations are neutral or deleterious, but in some instances, the new alleles can be favored by natural selection. Polyploidy is an example of chromosomal mutation. Mutations are changes in the DNA. A single mutation can have a large effect. 1) mutation - an alteration in DNA sequence, various types 2) intragenic recombination - results in entirely new associations of genes not present in either parental genome. Two forms of intragenic recombination: a) crossing over b) independent assortment 3) reticulation – acquisition of genetic material from unrelated or relatively unrelated sources (e.g., hybrid species, horizontal gene transfer).

Question 8

Which best describes transformation in bacteria?

Accepted Answer

"Bacteria take DNA from their environment" is what best describes transformation in bacteria.

Question 9

Which of the following statements about aldosterone is NOT correct?

Accepted Answer

Aldosterone, the main mineralocorticoid hormone, is a steroid hormone produced by the zona glomerulosa of the adrenal cortex in the adrenal gland. It is essential for sodium conservation in the kidney, salivary glands, sweat glands and colon.

Question 10

What does the central nervous system consists of?

Accepted Answer

The central nervous system CNS is responsible for integrating sensory information and responding accordingly. It consists of two main components:: 1. The brain 2. The spinal cord The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement. The brain can be divided into four main lobes: temporal, parietal, occipital and frontal. The spinal cord serves as a conduit for signals between the brain and the rest of the body.

Question 11

Who discovered the monomers of nucleic acids?

Accepted Answer

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.

Question 12

Reuptake refers to the

Accepted Answer

Reuptake refers to the process in the brain of neurons to retrieve chemicals that were not received by the next neuron. Neurons are cells in the brain that have miniscule spaces between them. They communicate with each other by sending chemicals across the space to the next neuron.

Question 13

The term facultative anaerobe refers to an organism that

Accepted Answer

The term facultative anaerobe refers to an organism that which uses oxygen when it is present or grows without oxygen when it is not there.

Question 14

The main result of aerobic respiration is the

Accepted Answer

The three steps within the aerobic respiration process are glycolysis, the citric acid cycle, and oxidative phosphorylation. Photosynthesis builds glucose, and what was built in photosynthesis is broken down during aerobic respiration. Hence, production of ATP from the breakdown of glucose is the main result of aerobic respiration.

Question 15

Which best summarizes the concept of natural selection?

Accepted Answer

Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.

Question 16

Which of the following is true about veins?

Accepted Answer

Veins are blood vessels that carry blood toward the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart. Veins are less muscular than arteries and are often closer to the skin. There are valves in most veins to prevent backflow.

Question 17

What is the purpose of the mucus in your nose?

Accepted Answer

When you breathe in air through your nose, it contains lots of tiny things, like dust, dirt, germs, and pollen. The air enters our body through the nose. However, before it enters the lungs, it must be heated and purified. Many dust particles that enter along with the air are removed in the nose by mucus and thus it protects lungs.

Question 18

Which of the following is true about blood plasma?

Accepted Answer

The first option is incorrect because it is devoid of blood cell, also red blood cells so doesn’t contains haemoglobin. The second option is incorrect because plasma is colorless. The third option is also incorrect because plasma contains the clotting factors.

Question 19

Which of the following is a characteristic of the Ascomycota?

Accepted Answer

Ascomycota is a division or phylum of the kingdom Fungi that, together with the Basidiomycota, form the subkingdom Dikarya. Its members are commonly known as the sac fungi or ascomycetes. Hence, Sac formation is a characteristic of the Ascomycota fungi.

Question 20

A gland below the bladder and surrounding the urethra is

Accepted Answer

prostate

Biology Questions