What are the rungs of the DNA ladder made of?

Correct Answer: Tiredness

Explanation:

From the aboe given options, only extreme and unexplained tiredness is the symptom of AIDS.

 

The other symptoms of AIDS include: recurring fever, thrush ? a thick, whitish coating of the tongue or mouth that's caused by a yeast infection and sometimes accompanied by a sore throat, diarrhea that lasts more than a week, headaches, lightheadedness, and/or dizziness.

Correct Answer: Sarcomere

Explanation:

The myofibrils are composed of actin and myosin filaments, repeated in units called sarcomeres, which are the basic functional units of the skeletal muscle.

Correct Answer: FALSE

Explanation:

FALSE. Basophils number will not be increased when parasitic invasion occurs.

 

Basophils are a type of white blood cell. Although they're produced in the bone marrow, they're found in many tissues throughout your body. They're part of your immune system and play a role in its proper function.

 

Basophils appear in many specific kinds of inflammatory reactions, particularly those that cause allergic symptoms. If your basophil level is low, it may be due to a severe allergic reaction.

 

Basophils contain anticoagulant heparin, which prevents blood from clotting too quickly. They also contain the vasodilator histamine, which promotes blood flow to tissues.

 

Correct Answer: Binary Fission

Explanation:

Most bacteria divide by binary fission, a form of cell division in which DNA replication and segregation occur simultaneously. This process involves active partitioning of the single bacterial chromosome and positioning of the site of septation.

 

Bacteria reproduce by binary fission. In this process the bacterium, which is a single cell, divides into two identical daughter cells.

 

Binary fission begins when the DNA of the bacterium divides into two replicates. The bacterial cell then elongates and splits into two daughter cells each with identical DNA to the parent cell. Each daughter cell is a clone of the parent cell.

Correct Answer: active transport

Explanation:

The only transport method that can move species against their concentration gradient i.e, from low to high concentration is called Active transport.

 

Facilitated diffusion only moves species down their concentration gradient i.e, from high to low concentration.

Correct Answer: Small intestine

Explanation:

The small intestine is the main area of the GI tract for absorption.

 

The small intestine has three separate sections. Theyare :

1. The duodenum

2. Jejunum and

3. Ileum.

 

Hence, the majority of nutrient absorption occurs in the duodenum and jejunum of small intestine.

Correct Answer: Breaking the bonds in a monosaccharide

Correct Answer: Cytoplasm

Explanation:

Glycolysis is the first step of cellular respiration. This process breaks down glucose into two pyruvic acids, and produces 2 ATP and 2 NADH. 

In eukaryotic cells, glycolysis and fermentation reactions occur in the cytoplasm.

Correct Answer: phosphates and sugars

Explanation:

In DNA, adjacent nucleotides are linked by a phosphodiester bond: a covalent bond is formed between the 5' phosphate group of one nucleotide and the 3'-OH group of another.

 

Hence, in this manner, each strand of DNA has a "backbone" of phosphate-sugar-phosphate-sugar-phosphate.

Correct Answer: prophase I, metaphase I, anaphase I, telophase I, cytokinesis, meiosis II.

Explanation:

The correct order of events during meiosis is:

prophase I,

metaphase I,

anaphase I,

telophase I,

cytokinesis, and

meiosis II.